You can download a free flight sim called FMS to start with and with an adapter cord you can hook up a radio to it and it works just fine. Now as far as model memory goes, I don't understand what the big deal is. I trim my planes for level flight and then make the mechanical adjustments so that the plane will fly with all the trims set at centre. That way all I have to do to switch planes is adjust the engiine and make sure the trims are centred to fly straight and level. There is the odd plane that may need servo reversal on the rudder or ailerons but that would require only one or 2 memorys if you didn't want to bother throwing the servo reversal switch. All I am saying is if you like a particular computer radio but it only has say 9 model memorys you can probably live with it. [8D]