a pz2 file is a pose file. It can load a morph and set any morphs to a specific value. Thats used a lot in Poser to create characters.

 

If your faceshop morph is compatible , just load V4, go to the Head, and have the properties panel open. From properties there should be an option to load a morph, select that and tell it where your obj file is. Give the morph a name , and you should now have V4 with your morph. Save it to the figures library with a new name.

 

There should be tutorials on making an inj pose so I wont try here. Its just a copy, paste from the cr2 to a pose file.