The cells will be held together by thin metal tabs that are simply folded up in between them. Tear them off and clean up the spot welds with a dremel or rough sandpaper. You will need some pretty good soldering skills along with a decent iron to get it done right, but if you are confident then it will be easy enough. You may also look into a jig from Deans, it makes life much easier. But I always had good luck simply laying the cells out and gluing them together before soldering it up. Like someone else said get some cell shrink wrap to protect the cells before assembling.
This is a pretty good step by step I found, but its pretty old so the pictures are not up anymore. Also not every step or tool listed is necessary, some of it is for style or luxury.
http://www.ultimaterc.com/forums/showthread.php?t=37810