ok... now.. i try to explain everything (im not very good in english.. so.. please help me on that)...
with the official Video Drivers of my Geforce4 420 Go by Toshiba.it all works good..
but.. when i install the modified OmegaDrivers (performance profile) i have this 3 problem: (first 2 fixed)
the max resolution of my screen goes from 1024x768 to 968x768 (or something like that.. i dont remember) the result is the my laptop monitor have a black side on the right...
the solution was:
i added the following lines at the OMG_DISP.INF file under the 2KXP_INF directory (not quality or performance one), in the bottom of the [nv_SoftwareDeviceSettings] section (after the ";;; --== Omega settings for the System and CP ==--"):
;-----------------------------------------------------------------------------------
;Added for fix the resolution problem of the drivers
;start------------------------------------------------------------------------------
HKR,, OverrideEdidFlags0, %REG_BINARY%, 3A,C4,00,00,00,00,FF,FF,04,00,00,00,36,12,64,19,00 ,40,41,00,26,30,18,88,36,00,1E,D7,10,00,00,18
HKR,, OverrideEdidFlags1, %REG_BINARY%, 3A,C4,00,02,00,00,FF,FF,04,00,00,00,36,12,64,19,00 ,40,41,00,26,30,18,88,36,00,1E,D7,10,00,00,18
;end--------------------------------------------------------------------------------
secondo problem was: when i come back from stand-by... black screen! so i modified this on the same OMG_DISP.INF file.. in the [Mobile_Tweaks] this is the change:
;-----------------------------------------------------------------------------------
;modified MapOSD3ToNV from 3 to 2 for fixing a black screen returning from stand-by
;start------------------------------------------------------------------------------
HKR,, MapOSD3ToNV, %REG_DWORD%, 2
;end--------------------------------------------------------------------------------
and this fix the 2 first problems...
now... i cant fix the third problem:
if i install the drivers (or reinstall) in the next reboot the Direct3D test on DxDiag (from DirectX) works good!! but at next (and all other reboot until i reinstall again the driver) i get the error "Test Interrupter by user by pressing a key" the test is not performed... exactly when i run the test it opens a windows.. then it minimize itself and close... (if i run Direct3D in a windows it works)
i found on the internet other with my same problem and different pc (and not omegadrivers) the reply of their message say to kill all process controlling HotKeys and try again... but.. i havent installed nothing new... so.. why don't work? and why it works if i reinstall drivers but only on the firs reboot???
i know it's not simple to reply if you haven't this truble... but.. dont say me... try if in this link there is something for you.. if you are smart at this try to think what can it be!
if you have some question try to ask... im a bit slow to reply becouse i haven't much time.. but i will..
i don't want to go back on Toshiba drivers 'cause they are very slow!
i don't know the VXG Drivers.. and on the OmegaDrivers.net say that it support the mobile card, too... this is not true???
for the question of DriversCleaner...
i Runned DriversCleaner.. i unistalled old Drivers... i reboot in winXP-PRO reduced mode (in italian is "Modalità (Mode) Provvisoria" i runned DriversCleaner (i followed the instruction of the tool) cleaned the Drivers.cab and the ServicePack Cab and then cleaned the drivers... but when i reboot it automatically detected my Toshiba Drivers....

i try to clean several time without no result..

so i installed the OmegaDrivers (in the readme of OmegaDrivers it don't say to uninstall the old drivers first.. i tryed to do it it don't work, i don't know why.. i suppose something strange with toshiba.. so i installed)