Full Screen?

ATM my screen resolution is 1366 x 768, so I cannot run CF full screen.
Is there any way to put the 1024 x 768 or 800 x 600 resolution to full screen, so there wouldn't be those stupid black bars in the sides..

On my old computer I was able to play with 800 x 600 resolution and it was stretched to full-screen, to bad it doesn't work on this computer.

If you know how to do it can you please tell me?