Poser Pro Pack does not convert the jpg to .bum - it uses the jpg instead. You only get problems if you are loading a character that calls for a .bum and the download has only provided you with jpg's. My Poser decides to freeze instead taking the jpg for the bum. Only thing left to do is to edit the Cr2 and change the file extension from .bum to jpg with search and replace.

Every organisation rests upon a mountain of secrets ~ Julian Assange