Hopefully, this will solve your problem.  However, be very aware that Vista and W7 have major issues with apps installed into Program Files folder which may prevent you from saving or accessing content.  It is a little problem called UAC, and if you search the forum, the most common solution is either total authorization or reinstalling Poser into it's own folder on the HD.  AFAIK, Poser does give the option to be relocated anywhere other than default and that has not changed over the earlier iterations.