Question : Problem: 2-video cards & 4 monitors

I have 2 confusers.  We will call  PC  # 1 and PC #2.  PC#1 = ASUS M2N-E mobo. I want to run 2 Video Cards & 4 monitors..   It has one PCI-e x16 Nividia now with 2 monitors.  My other machine=  PC #2 is a Asus M2N32-SLI-Delux and runs 2 Nividia 7900GS cards and 4 monitors. Has 2 PCI-Ex16 slots.   I don't run SLI just multi-task.  Is there a way my PC #1 can run 2 video cards and 4 monitors?  Only one PCI-Ex16 slot.
I was told that I can add a splitter to the DVI connections on the one video card for 2 monitors.  Would that allow them to operate separate? I don't want to just clone or span.

Answer : Problem: 2-video cards & 4 monitors

It is also advisable to use the same video drivers for both cards, to avoid conflicts that may arise.  If the main card is nVidia, get a PCI card that is also an nVidia.  I recommend this FX5200, which has two VGA ports (DVI was not available when it came out): http://www.newegg.com/Product/Product.aspx?Item=N82E16814133007