Powerpoint to PDF conversion (repost)

Edited: I am happy to run our current web app from our windows server and use a 3rd party command line tool to perform the conversions. This will need to be done using php and exec functions, if you can assist, please get in touch. PLEASE NOTE, this is NOT a simple conversion of a single document, it's a batch processing web app and as such will need someone to assist with the development. Previous information We have a working website which happily converts PPT files into PDFs, the main issue is that using the OpenOffice jar component and xpdf it appears that some objects embedded in the PPT (like excel data grids) are being ignored. We are running this off php/mysql/CentOS, but have access to a dedicated Windows server running the necessary versions of php and mysql. We need someone to jump in and make the necessary changes to enable the system to work with the existing file set and finalise the conversion process