Guitar in progress

Artwork Works in Progress
#1

This is what I have so far.http://img186.imageshack.us/img186/1086/picture3ti0.th.jpg
How do I join these two parts:http://img512.imageshack.us/img512/5707/picture4fe3.th.jpghttp://img512.imageshack.us/images/thpix.gifhttp://img186.imageshack.us/images/thpix.gif