I think I read that you can set your options in P6 not to use pmd files. if you do that and then load the figure it'll have the morphs in it if you save it back to the library. Then I'd think it could be used in P4/5. Of course you'd needd to have P6 to do it, or work with someone who does, and also owns Miki. You'd need to be careful of that to avoid copyright issues.