JoyRiderUSA

So I went out bought the game, and moved alot of my favourite unit mods from arma 2 addons to OA Expansion/Addon folder. I went in game and went under U.S. [Faction] and looked for my mods and they were not under that class. So I selected the default U.S. rifleman Operation Arrowhead soldier and set him as player and then I went under the class "empty" and there was my unit mods sitting under empty and 1. I couldnt play as them 2. when I placed them on the editor map and went in game they werent even there. Also I downloaded a kiowa helicopter mod and it wouldnt let me use it because of some USMC_soldier error. So theres no backwards compatiability with mods for the new expansion?