Instalación de PHP NUKE 7.0

[Duende]

buenas a todos..
Instalé el servidor apache 2.0.48 mas mysql 4.0.14 todo bajo win 2000, tanto Apache como Mysql funcionan bien.
el problema es que estoy intentando instalar el PHP-Nuke 7.0 y tengo problemas.
los pasos que realicé son los siguientes:
1- Descomprimí los archivos del PHP-Nuke en la carpeta destino
2 - Generé la base de datos en MySql con el script poniéndole el nombre por defecto del archivo config.php.
3 - Modifiqué los valores de las variables $dbuname - $dbpass - $sitekey del archivo config.php quedando de la siguiente forma:

----- config.php ---------------------------

$dbhost = "localhost";
$dbuname = "iusr_admin";
$dbpass = "iusr_admin";
$dbname = "nuke";
$prefix = "nuke";
$user_prefix = "nuke";
$dbtype = "MySQL";
$sitekey = "passadmin";
$gfx_chk = 7;

hasta ahí realicé todos los pasos que me indicaban en el archivo de instalación..
el problema es que cuando ingreso a la aplicación, aparecen estos muchos errores y no se como solucionarlo.

---- errores ----------
Notice: ob_end_clean(): failed to delete buffer. No buffer to delete. in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 18

Notice: Undefined variable: forum_admin in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 67

Notice: Undefined variable: inside_mod in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 70

Notice: Undefined variable: inside_mod in E:\Apache Group\Apache2\htdocs\html\db\db.php on line 44

Notice: Use of undefined constant sitename - assumed 'sitename' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 86

Notice: Use of undefined constant nukeurl - assumed 'nukeurl' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 87

Notice: Use of undefined constant site_logo - assumed 'site_logo' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 88

Notice: Use of undefined constant slogan - assumed 'slogan' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 89

Notice: Use of undefined constant startdate - assumed 'startdate' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 90

Notice: Use of undefined constant adminmail - assumed 'adminmail' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 91

Notice: Use of undefined constant anonpost - assumed 'anonpost' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 92

Notice: Use of undefined constant Default_Theme - assumed 'Default_Theme' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 93

Notice: Use of undefined constant foot1 - assumed 'foot1' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 94

Notice: Use of undefined constant foot2 - assumed 'foot2' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 95

Notice: Use of undefined constant foot3 - assumed 'foot3' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 96

Notice: Use of undefined constant commentlimit - assumed 'commentlimit' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 97

Notice: Use of undefined constant anonymous - assumed 'anonymous' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 99

Notice: Use of undefined constant minpass - assumed 'minpass' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 100

Notice: Use of undefined constant pollcomm - assumed 'pollcomm' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 102

Notice: Use of undefined constant articlecomm - assumed 'articlecomm' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 104

Notice: Use of undefined constant broadcast_msg - assumed 'broadcast_msg' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 106

Notice: Use of undefined constant my_headlines - assumed 'my_headlines' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 108

Notice: Use of undefined constant top - assumed 'top' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 110

Notice: Use of undefined constant storyhome - assumed 'storyhome' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 112

Notice: Use of undefined constant user_news - assumed 'user_news' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 114

Notice: Use of undefined constant oldnum - assumed 'oldnum' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 116

Notice: Use of undefined constant ultramode - assumed 'ultramode' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 118

Notice: Use of undefined constant banners - assumed 'banners' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 120

Notice: Use of undefined constant backend_title - assumed 'backend_title' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 122

Notice: Use of undefined constant backend_language - assumed 'backend_language' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 123

Notice: Use of undefined constant language - assumed 'language' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 124

Notice: Use of undefined constant locale - assumed 'locale' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 125

Notice: Use of undefined constant multilingual - assumed 'multilingual' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 126

Notice: Use of undefined constant useflags - assumed 'useflags' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 128

Notice: Use of undefined constant notify - assumed 'notify' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 130

Notice: Use of undefined constant notify_email - assumed 'notify_email' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 132

Notice: Use of undefined constant notify_subject - assumed 'notify_subject' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 133

Notice: Use of undefined constant notify_message - assumed 'notify_message' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 134

Notice: Use of undefined constant notify_from - assumed 'notify_from' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 135

Notice: Use of undefined constant footermsgtxt - assumed 'footermsgtxt' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 136

Notice: Use of undefined constant email_send - assumed 'email_send' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 137

Notice: Use of undefined constant attachmentdir - assumed 'attachmentdir' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 139

Notice: Use of undefined constant attachments - assumed 'attachments' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 140

Notice: Use of undefined constant attachments_view - assumed 'attachments_view' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 142

Notice: Use of undefined constant download_dir - assumed 'download_dir' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 144

Notice: Use of undefined constant defaultpopserver - assumed 'defaultpopserver' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 145

Notice: Use of undefined constant singleaccount - assumed 'singleaccount' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 146

Notice: Use of undefined constant singleaccountname - assumed 'singleaccountname' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 148

Notice: Use of undefined constant numaccounts - assumed 'numaccounts' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 149

Notice: Use of undefined constant imgpath - assumed 'imgpath' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 150

Notice: Use of undefined constant filter_forward - assumed 'filter_forward' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 151

Notice: Use of undefined constant moderate - assumed 'moderate' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 153

Notice: Use of undefined constant admingraphic - assumed 'admingraphic' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 155

Notice: Use of undefined constant httpref - assumed 'httpref' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 157

Notice: Use of undefined constant httprefmax - assumed 'httprefmax' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 159

Notice: Use of undefined constant CensorMode - assumed 'CensorMode' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 161

Notice: Use of undefined constant CensorReplace - assumed 'CensorReplace' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 163

Notice: Use of undefined constant copyright - assumed 'copyright' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 164

Notice: Use of undefined constant Version_Num - assumed 'Version_Num' in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 165

Warning: Cannot modify header information - headers already sent by (output started at E:\Apache Group\Apache2\htdocs\html\mainfile.php:18) in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 188

Notice: Constant _YOUHAVE already defined in E:\Apache Group\Apache2\htdocs\html\language\lang-spanish.php on line 157

Notice: Use of undefined constant main_module - assumed 'main_module' in E:\Apache Group\Apache2\htdocs\html\index.php on line 20

Notice: Undefined index: HTTP_REFERER in E:\Apache Group\Apache2\htdocs\html\index.php on line 24

Notice: Use of undefined constant nohtml - assumed 'nohtml' in E:\Apache Group\Apache2\htdocs\html\index.php on line 25

Notice: Undefined variable: file in E:\Apache Group\Apache2\htdocs\html\index.php on line 42

Notice: Undefined index: 2 in E:\Apache Group\Apache2\htdocs\html\mainfile.php on line 241

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así.. hasta que se muestra la página.
si alguien tiene idea de como solucionarlo desde ya gracias..

saludos a todos