Cool...ya...if the games still do not work so well, you really should buy a cheap AGP x4 card to install instead. AGP x8 will work too, but your motherboard can only use x4 speed.
I recommend something like an AGP NVIDIA 6200A-Le which is very cheap. Games will play a lot better than the SiS onboard video.
Anyhow, yep, post the new crashes if any.