You need to make a temporary us account use 90210 as zip code make that as primary account after that download all the dlc with your code on that account but don't start the game after the downloads finish start the game with your Asian account after the game starts you will see that you have all the dlc after this you can make you Asian account primary again and you won't lose the items I used this method and was able to play both the alpha and beta on my Asian account and later in a week I'm getting the us version of diablo 3 ultimate evil edition and still be able to get the pre order bonus items I hope this helps if you still don't understand add me on ps4 or ps3 or ps2 and I can explain to you on party chat