Problems with non-standard resolutions with omega on Notebook

leberwurst

I´ve a Clevo Notebook with ATI 9600 M10 and 1400x1050 LCD. I´m not using the Clevo-ATI-Driver, because they havn´t the choice of much resolutions. Therefore I used the omegadrivers. With these drivers i get a problem with some of the non-standard-resolutions. Many of these resolution getting a smaller resolution with a large desktop. Etc. I choose 1280x960 and i get a large desktop in 1152x864 res. and i have to reach the sides of this desktop with mouse scrolling. I´m sure that these problem can fixed about the driver settings in the registry, but I don´t know how. Unfortunately there´re about 100 settings in the registry. In Linux I can create with the ATI-Linux-Driver every screen-resolution i want.
Can someone help me?
Please excuse my bad english!