Look in your Aces High\Settings folder for files that start with the plane name. Convergence and head positions (view settings) are saved for each plane in a separate file. The planename.cfg file (for example p47d11.cfg) contains the convergence settings, and the planename.hps (for example p47d11.hps) contains your head position settings for each plane. If you want to give your friend your settings, copy these files for each plane you have customized, and have them place them in his Aces High\Settings folder, overwriting the files he has in there now.
Also, I can't seem to find the link, but there is a user who makes a package with head position settings for ALL the AH planes available for download. FYI. I'm sure somebody will stop in this thread and post the link here shortly.