Tailhook - thanks for your reply. My brain eventually functioned and I found RCGB-40 and downloaded it but with no file to add the details I could go no further. There seem to be .cfg files for single and multi engined props and jets which are probably accessed by the .cfg files in each aircraft panel folder.
I contacted PCPilot who sent me these two paragrahs. I tried what was suggested but to date have not got anyehwere at all:
In the case of aircraft cockpits (or any other aircraft component), a very specific protocol of filenames and locations is required to make them visible and operable so in your case, they are likely "shadowed" somewhere other than where you are looking. To begin the search, I would first remove the panel folder completely from the aircraft that are mysteriously showing them, copying them to a safe place for later retrieval if necessary. If the panel fails to show, then your "hidden" files are still not visible for some reason. If nothing has changed, you now know that your files are located somewhere else on your system. Repeat this with the "Model", "Texture" and "Sound" folders to verify the results. To test this, open Windows Explorer or My Computer and click on "Tools" from the menu bar. Open the "View" tab and scroll down through the "Advanced settings". In addition to checking "Show hidden files and folders", make sure that "Display contents of system folders" is checked and "Hide protected operating system files" is unchecked. While you are there, it is a good idea to be sure that "Hide extensions for known file types" is also unchecked.
If after doing this, the files still don't appear, it is time to call out the hounds and begin searching your system for the wayward files. The best place to begin is the Windows search function. Open the Windows Start menu and click on "Search" and then from the left pane of the next window, click on "All files and folders". In the "All or part of the file name" box, enter "panel.cfg" and click on the "Search" button at the bottom. Depending on how much storage capacity your system has, it may take a while for all the hits to appear so this might be a good time to sit back with a refreshment for a bit. After the search has stopped, all the instances of a file with that name will appear in the right pane. Right click on each instances of the returned results and choose "Go to containing folder". If you click on "Folders" on the button bar (just beneath the menu bar), you can trace it back to its exact location using the tree view in the left pane.