I am not familiar with iGO8, I have used since 6 years....
Try this, I have mod from 800x480 to 800x430 just for you!
If it works keep it, if not works throw it and try to find for what you are searching in the right resolution:
This is the right link for you: [Only registered and activated users can see links. ]
thank your! But by loading, it find an error, tryning to load ui/truck_800_480.bmp......