Recently I have been trying to add a bigger aircraft (Boeing 767/777, Airbus A380, etc) for international flights. I successfully download the aircraft files and extract them to my created folder. I then copy the aircraft folder over to SimObjects\Airplanes folder. Sometimes the aircraft shows up, sometimes it doesn't. The aircraft that I have been able to successfully load up on FSX has little to no functional switches/knobs, no working GPS or screens, no working panels, and so on. I have followed all "ReadMe" notes in the folders as well, but with little to no success.
I would like to mention that I am currently running SP1 as SP2 caused my menu bar and ATC menu to become illegible and glitchy. Seeing as I am new to flight simulating and the computer side of flight simulating, I need some input/help on what steps to take from here to help and solve this problem.
Any help or suggestions is greatly appreciated!