I believe that is covered in the PDF help file. It has to be a correctly formed Poser full body morph with a working dial (valueParm) in the BODY section.

If you have a character morph where the individual body part morph dials are set all you need to do is load the character into the scene with its morphs set. Use the Poser menu Figurecreate full body morph. Then save back to the library and use that CR2 in Wardrobe Wizard 2.