Just recently, the SAS 1946 team came out with a patch/update. The update enables all the (previously) non-airworthy aircraft to be airworthy!
Like the M.S. 406, etc. They also come with realistic cockpits! Patch itself is 360mb, mod is 240mb. Both download fast, and are easily installed. You can see some videos of me using G.55s and M.S 406s VS ME-109s on my youtube channel. (youtube.com/Togeita) I wish there was a compatible mod, for the Bloch MB.152, though... Would die to fly one of those, into combat.