Thanks a lot, Omnisome. I'll keep all that in mind. But there still is one thing that's bothering me:
My bus speed is PC2-5300, and I gather that if I do end up buying PC2-6400, it should be backwards compatible with 5300, but that it will run at the same speed as the 5300. But surely there should still be a performance improvement to be gained from changing from 1GB 5300 to 2GB 6400.... Right??