4 Monitor Setup Problem

[chisness]

Hello,

I'm trying to get my four monitor setup working, but keep running into
problems. I've got four Viewsonic VP201b monitors, all on a four
monitor stand.

I have an AGP PNY GeForce Ti 4600 and a PCI PNY GeForce FX 5500. Each
has two slots (AGP has a DVI and VGA, PCI has two VGAs).

So far, the best I've been able to do is have one video card work at a
time. I can get the computer to recognize all four monitors and two
video cards, but when I try to enable the PCI card monitors, the
computer instantly freezes (no mouse, nothing). Upon restart, the two
continue to work fine.

I've tried different drivers and even tried a different video card.
With the other video card (a GeForce MX 4000), when I try to enable
the monitors on it, all screens turn black and even upon restart they
are still black. I have to go into safe mode to uninstall the video
cards to fix this.

Is this a valid way to do a four monitor set up? Do I need a special
four monitor video card instead? If I do need a four monitor video
card, what are good AGP ones (that are as inexpensive as
possible) and how do they work (I think they usually have two slots and
an Y adapter)?. If I don't, any ideas on how to fix this?

Thanks a lot