Aplicacion web de fotos

[K-anario]

Hola, en una aplicacion que esta basada en php, me pide una serie de datos que desconozco lo que poner, alguien me echa una mano para configurarlos:
me pide:

ERROR: Value for lr_res is incorrect
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thumb_res
Description: Size (in pixels) of the generated thumbnails, width per height. Note that thumb_aspect will influes on the final dimensions by preserving or not the aspect ratio.
Example: "100x100"
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thumb_qualit
Description: Quality (from 10 to 100) of the generated thumbnails
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thumb_aspect (normal/square)
Description: Aspect of generated thumbnails. 'normal' (default) preserve the ratio between width and height, the largest side won't be larger than the one specified in thumb_res. 'square' picture is cropped in the center, also note that only the left number of thumb_res is used.
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lr_limit
Description: Size (in bytes) where we generate a low resolution picture. Basically, if the picture is bigger than this size, a low resolution picture will be generated.
Example: "1024*100" mean that if a picture is more than 100KBytes, we generate a low res.
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lr_res
Description: Size (in pixels) of the generated low resolution pictures.
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lr_quality
Description: Quality (from 10 to 100) of the generated low resolution pictures.
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highres_min_level
Description: Mininum level to be able to see high resolution pictures, Value can be from 0 to 999. "1" means that you need to be authenticated to see them, "0" mean that everyone as access to them.
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exclude_files_preg
Description: This variable contain a perl regexp (Regular Expression) of files/directories to exclude when parsing directories. Please modify it carefully as an improper value may break your whole site and/or render previously invisible files visible