A lot of people start with the 3 channel set up exactly as you (it's easier to learn on) and get used to turning with the right stick, when you then go to an aileron plane certainly initially you'll be mainly using ailerons to turn as opposed to rudder but they put it in the same place so it doesn't confuse you as you're now used to using the right stick for turning.
When you become more advanced and doing aerobatics / 3D you'll then also start to use the rudder as well as you can't do a slow roll (and a number of other aerobatics) without loosing line until you do.
At some stage in the not too distant future (couple of months) when you're a bit more advanced you'll then also start using rudder and coordinating it for every turn, I've only started doing it fairly recently as it's neccassary for turning in Harriers and other 3D but wish I'd started a few months back as it would now be more "natural" to use both.
In essence though get used to using just the ailerons for now and as the plane banks give a touch of up elevator, the more up you give the tighter the turn then becomes but this will become natural fairly soon and then in 3 months or so start introducing rudder with it.

RCKen - that link isn't working by the way.