cronicles of riddick wont work open gl prob i used riva tuner but nothing happens screen goes black and frezze at licence screen. i have geforce 6600agp. plz help

I think it's probably the bad OpenGl renderer that came with the PC version. Go here and download the NVIDIA OpenGL fix file from there. Decompress it using WinRar or some other program and extract the file to the C:\Program Files\Starbreeze Studios\Riddick EFBB\System\Win32_x86_SSE2 folder, replacing C with another drive in which you have installed the game if you haven't installed it in C. Now run the game and it should run perfectly. And I think you need more RAM, 256MB is too low for the game to run properly.