I'm "merging" two computers into one, with the result that I'd like to use 2 monitors. I have two graphics cards (only one VGA output each) but I cannot enable twinview at all.

The 2nd monitor only works once the proprietary Nvidia drivers are in use, and even then I can only select "second X server". And when doing this, I can't even get the keyboard to work on this screen!

Both cards are Nvidia: GeForce 6200 LE and GeForce 8400GS

Any way to get twinview to work?