on the non-translated version of v2.1 you can change body types but i did not find any direct way to do it.. and sometimes stuff just don't work.. you can try this if you really want to right now, i even have a tutorial up in the tutorials section..
just go to the player you want to edit in roster management, go to his edit player screen then switch to the trainer and make the edits.. go to the tutorials section i have one up there..