Sure, use what you like. I dont do any commercial python work so I have no need to protect my stuff.  I would be peeved if someone took a script and sold it without changes but to be commercial you need lots of error trapping.    There are some dialog options in poser 7 and maybe 6 , otherwise you need to use tkinter which is just nasty in my limited experiance. ;)   

There are several python guys who could do this easily, maybe one of them would be interested in a collaboration.

Just a point but the character in a string indicates a control character and will usually blow up. Best to use / or   in path names.