You might check out this link also:
wiki.cchtml.com/.../Ubuntu_Jaunty_Installation_Guide

I got my card to work finally but right now Im not at all happy with it
all. My screen resolution through correct vertically, will not fit
horizontally. I cant for the life of me get the refresh rate to set on
the right one. Right now Im on the middle setting on desktop features,
when I have say email up (thunderbird) the app is up above the screen
area. I have to keep pulling it back down into the viewable screen. No
clue what is causing that. I turned off all desktop features and now
things are back to normal... well kinda.

My top menu bar is now fracked! The buttons are all out of place and
several I found are NOT movable -- like networking and google desktop.

You can get your drivers to work but, at what cost?