The good news about WindowsXP is that it's so bloated, it won't even fit on my PC's hard drive. So if for some crazy, substance-induced reason I decide I want to install it, I can't. :-)
AGAExtender sounds like a design similar to the Grafitti box. The readme mentions VisCorp and Amiga Technologies, so It's a pretty old design. I don't know how useful it would be today. Might be fun to play with, though.