I thought I had this multiple video card thing figured out... and so I tried a radeon 7000 PCI with my geforce 7300 PCI-E and couldn't get it work. And then I tried a geforce 6200 PCI with a geforce 7300 PCI-E and couldn't get that to work properly. I could actually get all 4 monitors to come up with "X -retro" with a heck of a lot of fiddling on xorg.conf... but it wouldn't work properly with the full X session GUI. I guess that getting the geforce 7300 PCI-E to work with a Geforce MX420 PCI was a lucky combination. Too bad. I really really wanted it to work.