Here ya go, jmike
to start with I took the tv and removed the case, unplugged the speakers (don't worry about keeping these in good condition, unless you plan on using them on the cab. I'm not planning on using them so I just threw them out.)
The actual screen is held in with screws drilled into a metal attachment in each corner of the screen. I simply made a frame out of 2x4s and then used the same screws that were in the plastic case to drill into the wood to hold the screen in my frame. The frame is in a picture I already posted, but the screws holding it in look like this:

From there I planned out how I was going to put the frame into the cabinet. I'll be honest with you, but I measured wrong about 4 times before I finally got to where I could put the screen in and still have enough space for the cover plate etc. It looks like crap and its a pain in the ass but on each side of the cabinet I did this:

I pre-drilled the holes and got two guys to hold the screen in place while I screwed it in. (Predrill the holes, otherwise your helpers are going to be whining about how heavy it is while you try and get a screw started.

) Four screws on top, four on the bottom and two down the sides, repeat on either side and it feels quite solid. MAKE SURE YOUR SCREWS ARE LONG ENOUGH TO MAKE THE TV SECURE, BUT NOT LONG ENOUGH THAT THEY GO INTO THE SCREEN! I came really close to doing that. Luckily I realized what I was doing before I started drilling.
After that you should be good! The back of my mounted screen looks like This:

I know the frame looks like crap, but I think it'll hold and I'll be covering up all the nasty looking spots.
Hope that helps! Keep in mind, this is my first cab, and I am by no means an expert on this.