I'm using a NVIDIA GeForce 6200 card. It's not fully supported by SNAP although it seems to have a similar chipset as a fully supported one (6600? I forgot...) that's why it's working almost flawlessly. The only issue I noticed is that after every display resolution change to a dual head mode (for instance, right after a (re)boot, a fullscreen OS/2 or DOS session or some game) I have to use gactrl.exe to reactivate the second screen. Put it as an object into my XCenter bar, but still kind of annoying...