Synthlight

My goal is to be able to have my bow appear on my back with my sword equipped & drawn (and vice verca). Whats the best way to go about this? Would it require altering the .nif? I've made mods before (mostly scripting) but never any modeling or anything like that. I don't really know where to begin here. PS: I've made an attempt or two with SkyEdit but it ended in miserable failure. :(