crashing - have already checked stickies

For performance, try using some of the 'disable' options in the video options. As you have a card pretty near the low-end of the GF6000 series, you should also try turning off anti-aliasing in particular.

Raising the size of your page file can help with both performance and stability--at least 1gb is recommended, 2gb is even better.

Unless your video card is a special third-party-designed model that does not support the reference drivers, you should be able to get some much newer ones from nVidia.com.