It Works!!!! ;D

I have managed to get it working quite fine...
Finally I have used r_flap_key tags for trail and edge flaps...
Both are in retract position at 0 and 100 keyframes.
Edge is full extended at 20 and 50 Keyframes.
Trail is full retracted at 20 Keyframe and full extended at keyframe 50.
This way, flaps have two positions: First with edge extended, and second with edge and trail extended.
Great!
Thx for your help Felix ;) soon will be here with another question :)
By the way, you can see some pics of my plane at :
http://www.ala23.com/virtual.htmRegards