http://vayne.fdns.net/presario.html
That's your ticket, all of the info you need is right there but it will take a lot of reading to get it figured out. Key things, you need a 2.6 kernel with AGP support and DRI. AGP is built into the kernel and DRI is compiled as a module.
The guy has a package of the xfree86 all setup for the IGP320. Look for the package, download it and do any setup instructions he has. The key is what he says in that paragraph because there are a few things you need to do so pay attention. If you play your cards right you should be able to get it working.
I did this on Mandrake 9.2 myself. Good luck.