Burl, thanks, I'm glad it was helpful.
The materials list would be:
-GFCI outlet and cover plate
-metal box with mounting ears and built in romex clamps
-10 feet or so of 14/2 (14 gauge, 2 wires plus ground wire) "romex" wire
-handful of cable clamps
-a 1/2" romex box connector

I don't know how short of a piece of romex you'll have to buy. Probably 25' at least, I suppose.
When you cut the hole in the paneling, you'll have to allow for various protruding parts on the sides of the metal outlet box. Or if the box's mounting ears are removable brackets like mine were, I was able to remove the lower bracket and slip the box into the hole from the rear, then slide the bracket into place from the front side and screw it back into place from the rear. All in all, messing with that box mounting is the hardest part of the job IMO. And it's not that hard.
Another tip, if you look closely at the GFCI outlet installed, versus the one I used at the end for the wiring tutorial, you will be able to see that I removed the mounting ears on the front of the installed one. They are designed to be bent back and forth and removed if desired. If I had left them, they would have interfere with the mounting screws of the box itself.
To remove the outer sheath of the romex, take your utility knife and carefully cut the sheath right down the middle. This way you are cutting over top of the bare copper wire, and not hitting the insulation of the other two. Peel the sheath back and then you can pretty much just tear it around the circumference to remove it. In the outlet box you want the sheath to just enter the box, and then have about 6" of free wires to work with. You will bend them in a Z pattern when you have made the hookups, so they will compress nicely into the back of the box as you push the outlet into place.
In the panel box, same thing, the sheath ends just inside the box. Look at the others as a guide. Then you need probably a foot or more of free wires. If you have extra, either shorten it prior to connecting, or fold it out of the way.