what you can do is go to your bios and increase the "Aperture Size" depending on your mobo bios you can increase it to 256 or up to 50% of your ram. here have a good read about Aperture Size examined and explained.
Oh man I have a eMachines computer, onboard video is horrible IMO. I had 192 megs of RAM and the aperture at 128 and I only got 8 megs of Ram for the onboard video, I think 32megs is all your gonna get. (I know the aperture was to big, but that was in the day I didnt know much about that stuff)
But my eMachine is almost 4 years old so yours maybe different. I slapped in a Radeon 32 mb SDR and the preformance jump was huge, getting your bro a video card might be the best solution.