Is there a guide to take apart the M6400?

My friend has an M6400 they want to take apart for cleaning and reapplying thermal paste and the like, and he doesn't want to just go straight into it ripping it up. Is there any guide we can follow just so we can at least make sure we're doing it correctly? He's already taken a bit of it apart (removed the keyboard, the back panel, etc.), but he wants to be able to clean the inside part. Not just the top or bottom of it. Anyway, I hope someone can guide me the right way! Hahahaha....

Terrible joke.. I know..

 

http://support.dell.com/support/edocs/systems/wsm6400/en/sm/index.htm