Jake,
I would like to try and help you with your POSKY issues, since I have recently "assembled" a few POSKY models to give them a try. My Installs have been "Wonder Bread"... just the specific Aircraft, with no Panel mods or extra Repaints.
I need you to go into your Main FS 2004 Aircraft Folder, find the specific 737-800 Folder you have, and give me the FILE NAME, just as you have it installed in your Main Aircraft Folder. I also need to know which site you downloaded it from.
I will download the airplane and see if there are any issues. I can tell you from personal experience flying the POSKY C-17 Globemaster, that there is no VC Panel or wing views; the Panel uses the Default 747-400 Panel which shows up complete, and the AP seems to function with no deviation. I made an almost three hour flight from Guam to Tacloban, the Phillipines using the AP most of the way, and the airplane flew fine.
Like we have said before; the more information you can provide, the easier it will be to solve the issues you're having.