Don't think it's possible, Motorola likes to lock down their phones and make it difficult. Motorola really should ditch the butt ugly Motoblur and port their Philblur or whatever it is Droid X and Droid 2 uses.
Too bad there isn't work on a rom for the Charm but I'm not shocked. Moto made so many entry level models and filled the market with them. I don't even hear a word about that Droid Pro that was supposed to be better than the Charm. Guess it wasn't popular.