After browsing the net some sites say if you turn (via ailerons) right use right rudder.. and others say if you turn right use left rudder... Help!! now I am comfused....

If you bank right you use a little right rudder, and if you bank left you use a little left rudder. The object being to keep the aircraft pointed in the direction of the turn. Using opposite rudder is called banking without a turn. Thus if your flying eat, and you apply a little left aileron, and a lot of right rudder the plane will keep going east but it will slide sideways.
You only use a little rudder for a coordinated turn. Really it's only for scale like turning anyway. Also coordinated turns are smoother, and bleed less speed.

Ok.. thx.. I did not want to try and learn something new and then have to unlearn it later..

there is need for co-ordinated turns in RC with certain aircraft. (cubs for example) the reason that you need to do this is called "adverse yaw". when you use ailerons the plane wants to point the nose towards the opposite wing. if you watch closely yo will see the nose climb a bit when banking for a turn but once you release the bank it drops down again. using rudder eliminates that.

again some planes need more rudder than others.

using opposite rudder will put the plane into a "slip" this is were you cancel out the turnning caused by the bank and fly "sideways" this is a good way to bleed off speed during a deadstick or glide but should be practiced high up as it can lead to a stall if you arent ready for it.

its a good idea to practice using the rudder when you fly, just do everything a few "mistakes" high so you can be ready for the results.