Mr. burner12,
Sp2 and Acceleration are the same Service pack version; and AlphaSim's Enterprise (Big E) is NOT fully-compatible "Texture wise" with either. They did say, 2 or so years ago, that an update with be forthcoming but it still hasn't shown up. You can however, use it for its intended purposes but the Acceleration carriers are much nicer (visually) in many respects. However, if you are only using SP2 then AICarrier is another freeware option for you but I do not know if you have to have Acceleration only to use it or not.
Hope this helped!
