Any help would be appreciated.
Used Donster's hills/dunes, now I have to edit some sound files that returned from the dead! I've gone Winchester.... dooh!

[...Dolfo's skins for the desert scenerio...but what planes should be assigned in ECA Panel]

Well, what you have to do is check what skins you downloaded. If there is no readme, just unzip the file to an empty folder and check out the filenames. You should be able to figure out which is which (Phurr*.tpc is the Hurricane, P190a*.tpc is the FW190A, Pp51b*.tpc is the P-51B, etc.). If I could be more specific, I would, but unfortunately this laptop doesn't have any of my EAW files on it so I can't look this up right away (now a few days from now that should be a different story).

As for which planes to use, that is up to you. Obviously if you plan to use the skin pack from Dolfo's, then you will be limited in your selection of aircraft. However, there are many skins available, as well as some altered .3dz files, such as those for the Beaufighter. Just which ones to use depends on how much historical accuracy counts for you. If you wish to keep things strictly historical, then you'd want to choose British aircraft like the Hurricane, Spitfire MkV, Tomahawk, Kittyhawk, Beaufighter, Wildcat/Martlet (yes, a Fleet Air Arm unit did fly them in the Desert), etc., and German planes like the Me109E, F, and G, the FW190A-4 (late '42-early '43), Ju87 Stuka, and He111. However, as I noted, you can always play some of those "what if" scenarios where you can use some later-war aircraft if you like, such as an excellent desert-skinned FW190D.