The advantage of this is that through the POST variables, you can select a different page to display, essentially allowing you to have multiple pages for a single product. You would, of course, need to provide the links to the secondary pages, but they will appear inside the OSCommerce engine with the buy now links and all borders.
This is a very simple mod with about 15 lines of code in one place and won't affect your current products.
Top 4 Download periodically updates information of Product Page Substitution script from the developer, but some information may be slightly out-of-date.
Our script download links are directly from our mirrors or publisher's website. Product Page Substitution torrent files or shared files from free file sharing and free upload services, including Rapidshare, MegaUpload, YouSendIt, MailBigFile, DropSend, HellShare, HotFile, FileServe, MediaMax, zUpload, MyOtherDrive, SendSpace, DepositFiles, Letitbit, LeapFile, DivShare or MediaFire, are not allowed!