What is your video card ?
You will need OpenGL drivers, some \"old\" boards like the Voodoo only have Glide, but you can find OpenGL wrappers for them. Those wrappers usually work fine, though I\'m not sure about the size of the texture they can handle.
I don\'t think there is a D3D plug-in for PS yet, am I wrong ?
You could also try the software rendering mode, with a smaller windows...