NNewcomb wrote on Dec 12^th, 2011 at 3:47am:

Thanks, Mark! P.S. When I was working on this, I noticed that i have the SITM livery for the 727 in the file, but it does not appear in the aircraft selection. Do you know what could be wrong there?

There are a number of reasons for why.
1) The panel folder or CFG is wrong, like not pointing to the right folder or the gauges are not where it is being told they are, but I doubt it is this reason.
2) The model.cfg is not pointing to the correct MDL files. I would almost bet it could be this one.
3) The texture folder or the actual textures might be missing. This one is another good possibility.