Can you add a panel to an airplane?

Sorry to start a new topic, but had a quick question. One of my planes doesn't have a 2D insturment panel. I downloaded an old style 3 engine (one on each wing and one in front of the tail) Lockheed Delta 1980s paint job plane and the download did say it did not have a panel. Well, I wanted to give it one. Can I download a copy of any jet plane's insturment panel (777, 747, 737) and install it as the panel for this plane? Or does it have to be made specifically for that model? And uh,...how do I do that? I know how to add DLed planes. Do I just need to open the file under 'Aircraft', select the plane and see if it has a folder named 'Panel' and download a panel file from this site, and unzip and put it into that folder? That would be all I would have to do right?