possible to set swim/crouch/prone boundingbox in datablock?

I know you can set the main boundingbox in the datablock but what I wanted was a way to set the
boundingboxs for swim/crouch/prone in each models datablock like I do with the main boundingbox.
when the model enters the state swim/crouch/prone it reverts to what is set in player.cpp.
can someone give me a hand or push in the right direction with this?

thanks