ZionWorx uses TurboDB. There are a number of tools and accessories that can be downloaded from that site (check Google).
PowerPoint has no inteligent form of content management or format
and so I don't think you will find a method of extracting the slide data and converting that - withhout some hardcore programing.
I expect the fastest way to convert your ppt database is going to be cut-and-paste from PPT into ZionWorx.
That said however, it is certainly worth while doing a database search on this forum to see if you can find someone who has walked that road.