Solved !
I got the solution!
You don't need to update your drivers and don't need to modify cfg(s) :
(like - coldwarassault.cfg/operationflashpoint.cfg/armaresistance.cfg)
1. Download 3D Analyzer from the link below. (It comes in .zip file, so you have to download WinRar sometimes.)
Link: http://www.3dfxzone.it/files?object=3dfx&objid=100
Note : If this link get broken, go and search for "3D Analyzer - Graphic Card Emulator" on Google.
2. After downloading, install it!
3. Open it and click on select -
Note : At first the options will be disabled.
4. Select OperationFlashpoint/ Resistance/ ColdWarAssault.exe from the directory.
Now, Options will get enabled.
5. Now, go to Section DirectX8.1 and DirctX9 options ==> Hardware limits (cap bits) and check(enable) the emulate HW TnL caps like below picture.
6. You are done, now click on Run. The game will definitely run.
I just updated to ArmA Resistance 2.01 and it was not working and now it is running!
How much of you updated to 2.01 ?
But for playing, everytime you have to run with it.
(Credit: Ali Durrani - YouTube)