Well, so far so good... The stability problems seem to have went away. Running NvAGP = 1 and so far so good. Before I wouldn't last for more than 30min - 1hr doing anything more than surfing the web before a lockup, sometimes I'd boot repeatedly with lockups. After putting in the 18.104.22.168 kernel I'm able to play ut2004 and americas army for hours. Before I was lucky to get past a load screen. Yay!