To get to those links...
First one. From the main page go to the health section. And click the link that says hibernation.
There are two posts that are pinned at the top (stickies) it's right there.
Second one was in the housing section under heating.
Yes holding him against your shirt will work to warm him up.
Without a heating system for his cage, towels will do no good. You will need a digital thermometer, and a heating source. The heating source can be a space heater or a CHE setup, that consists of a ceramic heat emitter, a lamp that is rated for a CHE, and a themostat.