Delighted you're enjoying the book, Randy. I'll have another four or five annoyances on the site in about two weeks.
Shared video memory could be the problem. The downside of shared memory is it's gobbling up memory programs would use; worse, the systemboard memory just ain't as fast as video memory.
Look around for another Accelerated Graphics Port (AGP) video card.
Here's more info:
And the next book? It's still up in the air.
PC Annoyances: http://snurl.com/annoy