I was actually trying to get the "current" filename, not a default.  So if I opened an already existing  (not new) pz3, it would use its existing name and path as the starting point in the file chooser.

...on another unrelated note, I notice that if you hit "Cancel", it crashes Poser9 (or at least my Poser9).

I added the below before the Return in getpath (basically just checks to see if you left the default filename with asterisk in it):

if PZ3path.find("*") != -1:
    doIt = 0