Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.

If this is the AFS Design one released via First Class, it'll be an FS9 model (all his stuff is) and will not work in DX10 Preview mode.
Mr. "Lipra,"
This tool here -> (Addon Convertor X) will convert ANY Aircraft's DX9 Textures into DX10 formats (inc. .DDS) and it works 100% for aircraft textures in FSX DX10 preview mode. With Scenery, however, there are some limitations. It has also got a Trial Version for you to test and see before you buy; and for $19.95 USD it won't cost you an arm or a leg to do so. I highly recommend it for any pre-FSX Native models and any port-overs.
Good Luck!
Hebrews 11:6 "But without faith it is impossible to please Him, for he who comes to God must believe that He is, and that He is a rewarder of those who diligently seek Him."
Thank you very much.
Sincerely,
From,
James F. Chams