Italian Flyer,
The method described by Pizza, Ray, should work with Mode 1 or Mode 2. I started for 15 minutes last night and found it was getting easier to run this routine. For a Mode 1 radio, just use the inputs for whichever stick they are on. The key seems to be having the elevator centered when the rudder is at full deflection and then the rudder centered when the elevator is at full deflection. All the while you are holding a constant Left aileron at 1/2 and throttle at 1/2 or maybe less. Obviously you want right rudder with the left wing down and down elevator when the plane is inverted.

Maybe Ray can explain it better.