If you already have your model grouped with names that match the Poser standard I suggest that you use the P4 Nude Woman.CR2 edited to point to your new OBJ. You will need to set up the joint parameters, but you would have had to do that if you had used the Pro Pack bones/set up room anyway. I would start by realigning all the center points to match your figure.
Looks like an extremely well detailed model too.