I used to have Virtual PC with Windows 98 installed (running under Mac OS 9) on my Blue & White PowerMac 500MHz G3, 768MB RAM. I could play Quake 1 without any problems what so ever, in fact, it played the same as on a Pentium 1 processor. I don't use it any more since Virtual PC under Mac OS X is a different story; it is slower, but part of that is that VPC now comes with Windows XP which is a resource hog. If you were running Virtual PC on a PowerMac dual 1.XX GHz G4, you prolly wouldn't notice much difference, depends on the games and their requirements. Regarding using the network and internet, VPC shares all that with the Mac, in fact, I've downloaded files simultaneously in VPC and that Mac side with no problems. A really nice feature is copying and pasting between Mac and VPC.