All you do is download the whatever.zip file to your desktop.

Then goto the c:\program files\ipacs\aeroflyprodeluxe\aircraft folder.

You will see all the aircraft folders.

Then create a new directory that matches the whatever.tmd file in the zip.

The directory name has to be perfect. If the .tmd is GSYak54.tmd then the folder name has to be GSYak54 and it caps sensitive.

Then drag the contents of the zip into the new folder.

If there is a sound file in the zip it must be place in the sound directory.

That's it!