The problem is that there's no way to trial test it on Win7 before I spend the money, and no one from the company bothered to even answer my message so far. 

Their webpage has the download for Poser12 with the ability to test it out for 21 days. No such download exists for Poser 11 from what I could find.

At this point, I may as well continue my slow transition to Blender... the Poser folks don't seem to want my money (grumble, grumble)