Hi guys, Im trying to change the resolution and installing the proper drivers for my graphics card but i havent succeded.

Ive tryed putting this on the proper file but didnt work.
<key>Graphics Mode</key>
<string>1280102432</string>

Did sudo and the same, I went to preferences and then Chameleon to try and change the res and still the same. How can I change the resolution and Install ATI mobility radeon HD 3470?????


Thanks