Need a little file editing directions for a wicked idea :)

I posted this in the SLK object editing forum but it wasn't getting any notice.

I was wondering if there is a way to allow a unit's chest and other body parts to change their facing on the Z scale. What I have in mind is units flipping upside down and stuff by using the lock body part facing trigger, but I need to allow the units to change their Z angle.

Is there anything I could edit in order to get this to work?

i guess the only way to do that is to edit the model and skins upside down. seems like the only way...

Hmmm... there isn't a txt file or slk that restricts it I don't guess. :(