Much as I love Poser, I sure as hell won't drop two franklins on an upgrade that isn't consistently backwards-compatible with 5 gigs of Poser work and requires a 3rd-party utility unavailable for my computer for conversions. If I were writing something like this I'd change the extensions on the new figures, embed a "Propack" comment-token identifier, and deal with supporting the embedded geometry hack they invented. Where's Kupe when you need him to clear these things up?