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That is one of the most annoying thing about Acer IMO, is their lack of willingness to support their customers!
Your issue is that the video adapter is an OEM piece. (Same for the LAN by the looks of it.)
That means that ATI sells a chip to Acer, they then modify it and build it to their specifications, that means that only Acer drivers will work for it.
I would suggest searching Acer's site and find an older system with the same video chipset that still supports XP and see if that driver will work for you.
Asus M4A79 Deluxe, Phenom II 940 BE, 20,770 3D06Asus Moderator
~ My CPU Overheating Guide