The Kuhnhausen manual has everything you need to disassemble, diagnose, repair, and reassemble your S&W.
The manual shows all work the way they do it at the factory.
I recommend ordering it from Brownell's so you can also order a Brownell's Magna-Tip gunsmith screwdriver set made specifically for the S&W.
These drivers will prevent damaging the screws:
http://www.brownells.com/.aspx/pid=2...-A-SHOP-MANUAL
http://www.brownells.com/.aspx/pid=4...-W-SCREWDRIVER