[F22-Raptor-2006]

All other aircarfts are working fine. I installed :
B29 silver plate
Spit MK XIV
Tempest 11 & 13

They all work.

I can see the spit XVI in the list of aircraft, but if I choose it, the A20 is selected (first in the list).

Luigi

Ah ok that makes much more sense. Now that means you missed out a step in the instructions. Since you're not using the big mod packs you need step 2 i think it is. They are weapon clases from SAS. You need to download that and put it into yoru mods folder. Once done your game will work fine and you should be able to select the spitfires without a problem.