Made a quick remodel of the spider's body and added the armature.

http://img295.imageshack.us/img295/4218/spiderpreviewdr9.jpg

 

 I figured out that I can have add a bone to only part of the spider's er...butt. But asfter connecting the rest of the ..Butt to another boe, the rest of it left the bone it was originally connected to. Is that what the "Expend" is for?