Roger, how did you get this repaint to work? I tried adding it, but I can't alter anything in the aircraft.cfg file (i.e. I cannot save the .cfg file, because "access is denied"). I'm using FSX on a Win7 (64) under administrator rights. It does seem to be a great aircraft!
Do a Google on "Take Ownership for Win7" and follow the installation directions. Install the free download on your Win 7 (64) system. Then, all that is needed is to RIGHT click on the folder containing the file you wish to modify, left click on the menu option that says "Take Ownership". This will open a small window asking you to confirm. Click Okay and let it do its thing. (It will modify the user access parameters for every file in that folder.) Afterward, you should be able to save to any file in the folder including the aircraft.cfg file using standard Windows editing functions. I use this all the time on my Win7 (64) system and it works well.