If you use Phi Builder to create cr2's, Poser 7 leaves out parts of the cr2 when converting. Poser 6 doesn't, and neither does Pro Pack (don't have 5 so don't know if it does or not).

I'm sure I could use other tools to create cr2's that would work perfectly fine with Poser 7 (as I sure someone will suggest) but that's not the point. If it doesn't convert heir properly, then it shouldn't have the feature listed in the File menu.