firstly thanks for your reply...
-I have downloaded Ati Catalyst 9.3 and modify modder.
-Then extracted Ati catalyst to "C:\ATI\SUPPORT\9_3_xp32_dd_ccc_wdm_enu" and I cancelled the installation.
-Run the mobility modder, browse catalyst extracted folder and modified.
-After that go to "C:\ATI\SUPPORT\9_3_xp32_dd_ccc_wdm_enu\Driver \" and run "setup.exe".
-Catalyst installation has started but after a while an error occured:
"Setup did not find a driver compatible with your current hardware or os"
did I do wrong stg?