My sound driver uninstalls itself and Mozilla keeps crashing

Hi, Im somewhat new to linux, but Ive been able to squash every bug so far. Ive gotten all my devices set up, all my drives mounted, and my network running. There are 2 problems, however, that I just dont know what to do.

1. Every 4 or 5 times I log in my sound doest work. My sound card is integrated into my Nforce2 motherboard, when I reinstall my mother board driver and reboot my sound comes back.It would be great If someone could tell me how to make a script that will have my root run the installer every time I boot. It would be even better if someone would tell me how to stop the problem though.

2. My mozilla crashes... alot. I think I remeber the crash window thingy saying it was a segmentation fault or something. I use mozilla Firefox 0.8 with flash plugins and extended tabbed browsing plug-in