I hate to give an anti-answer answer, but I'm afraid you're not going to have much luck. The PPT file format is one of M$'s most jealously guarded "trade secrets" right up there with the PUB format. It is difficult, if not impossible, to find anything other than M$ products that read either format (even their other programs usually won't open them). Also, considering M$'s current attitude towards Perl, I doubt that they would even consider licensing the file formats for use in creating a Perl interface.

Sorry that I couldn't be more helpful.

-HZ