Unable to change resolution

[MortnT]

My computer was running beautifully after following this guide step-by-step:

http://forum.insanelymac.com/index.php?showtopic=72493

 

Afterwards, I updated to 10.5.1, and I couldn't change my screen resolution - it just says 1024x768, whereas my desired resolution is 1280x1024. The following topic fixed this problem:

http://forum.insanelymac.com/index.php?showtopic=72168

 

Now I tried to resolve the mouse tearing issue with the following guide:

http://hacker-vip.blogspot.com/2008/01/how...xing-mouse.html

 

However, I can't (again) change my screen resolution. I tried repeating the steps from the second topic I mentioned, but it won't help. Is there any way I can restore everything to it's default value? Or maybe reverse the terminal commands in the last mentioned guide?

 

P.S.: I have the Intel GMA950 graphics card on the 945GCMX chipset.