I took this part of his quote (bolded by me):

"One of the updates for Poser 11 makes destructive changes to cr2 files which are processed through P11. That subdividing morph thing changes all the valueParms in Body to targetGeoms, to facilitate the storage of deltas for the different morph resolutions."

to imply he is using one of the latest features, as in his post about different morph resolutions, which I took to be subdivision level morphs, which are only P11 and P11Pro. You can also only create them in Poser11Pro (and they are also read by P11 ) so again implying a latest feature. Perhaps in order to utilise that feature the .cr2 needs to be written differently. But as I said, if that's the case, leave the original for pre P11 versions and there's no problem. If I was wrong fair enough.