Sure, I've haven't tried myself but I'm certain it's easy enough.  You may have to edit your xorg.conf because YaST can't handle more than two monitors.  At least I've never found a place to set it.

All devices looked ready to go when viewed with lspci, hwinfo --vbe & dmesg while testing the card DVI & VGA outputs.

 

I don't think there is anything easy about this.  Sure, lspci and other utils will show the hardware installed, but getting them to play nicely with one another is another story.  I already know that you can't use your PCI video card along with your built in video on the motherboard.  You need two PCI cards with dual DVI connectors on each.   I also wonder if the cards need to be identical for it to work properly, I doubt it but its a possibility.  I have two computers here with dual displays so I can start swapping hardware right now to test, but before I do so I'd like to hear of someone else getting this working so I dont' waste my time.

Thanks for any feedback.

--
Chris
RHCE, SCSA, AIX5L, LPIC, CNE, CCNA, MCSE

I have run two separate video cards with dual ports in one box. I do know that works. However, I never tried hooking up more than two displays.

Another option is to get a quad-head video card (I think nVidia makes one) and use it. I've seen reports that running the nvidia binary driver on a quad-head card does indeed work, running each pair of DVI ports in TwinView mode.

Other than that, I haven't tried it myself...