How to edit human figures

got a few 3d models of humans in 3d form (not like the flat ones when you load you load up skechup). however by default they appear with there arms out and standing for exsample what im wondering is there a plugin or a way where i can move there arms, legs and everything else so that they look there standing normally or sitting on a couch?

They’ll likely be rigged for animation or posing in 3DS Max and other higher end modelling packages, SU doesn’t support bones, so there’s no way of reposing them in SketchUp other then by physically editing the mesh…which will almost certainly destroy any UV mapping and screw the texturing up completely.