Bueno, aparentemente si se pueden usar comodines:
Cita: METHOD: FileSystemObject.DeleteFile
Implemented in version 2.0
object.DeleteFile file [, force]
This method is used to delete a specified file
or files (using wildcards). The optional force parameter returns a Boolean value - True allows files with read-only attributes to be deleted, while False (default) does not. Trying to delete a read-only file without setting force to True will return an error.
Note that an error also occurs if you try to delete a file that doesn't exist.
Fuente:
devguru.com
Pero... la verdad que no sé como, no lo explica