any know how to cut the wings on a cockateel ?

Have you tried Googling it? It's not difficult, just spread the birds wing and look underneath and you'll see long flight feathers and shorter feathers. You cut the longer flight feathers off just past where the shorter feathers end.

 

How to clip a parrots wings
Another link

 

I used to clip them on my parakeets when I was about 12 years old. It's not difficult at all. If you are afraid of hurting them, just don't clip them very much. (they can't feel it anyways).

It might be helpful if you saw someone doing it first. I think just about any petstore that sells birds does it for a small fee and you could watch as it is being done.

here is a video from youtube.

http://www.youtube.com/watch?v=ffQF_tnxAmc&feature=related