Hi, I've done all as you said and installed driver for my GeForce4 MMX440. I had run tux racer to try it and it worked!
Problem was when I started some app my KDE crashed. I could move my mouse, bud couldn't do anything else(not even kill app) so I had to reboot my computer. Then I've get back generic driver, and everything was like before. Drivers didn't match my kernel. I have 2.4.18 -14 and it was 2.4.18-18. I didn't use src because i don't have kernel haders. What should I do?