You cannot install one on top of the other. If you already had Aces you should buy airplanes separately and skip ICE.
You'll need to create a separate account for the ICE code you have. Aces only comes with two other planes besides the free ones. Get your ICE edition activated and flying with a new User Account and then write us and we can try to give you the two additional planes that came with Aces.
I hate this Aces and the Lite editions. I wish we had never agreed to allow Aerosoft to sell it. Only confuses people.
/ 1C Games Studios
- Proud Developer of Rise of Flight: The First Great Air War and IL-2 Sturmovik: Battle of Stalingrad. The Best WWI and soon to be WWII Simulations on the PC!