I am in constant contact with tech support at Poser.  I don't know anything about complex graphics driver problems, but thier #1 response to most problems is, "did you delete the poser preference files"?

On my computer it's in:  documents and settings / user / application data / poser 7

just delete any the preference and configeration files in this folder and you may eleminate any weird settings poser has saved.

Gabriel Sabloff
TIRADE STUDIOS