yeah it looks pretty good from there. anyways, to edit once you've grouped, you can either ungroup them once you've moved them (best option) or you can give the group an edit mesh modifier, or try to convert it to poly/mesh; all should work (doing so wouldn't wield the parts of his arm together, btw, that only happens with booleans)
then, if you move the connecting arm verticies near the connecting body verticies, it'd be like you pseudo rigged it
edit:
not exactly brawlbox, but if you apply an unwrap uv modifier to whatever you're editing in 3ds, (then press edit under parameters)you can see its uv mapping, and use that to make textures