Programming stock Remote for 02 Cavalier (keyless entry)?

I bought a remote that is for my car and would like to know how to program the remote to my car! Dealers ask for too much money!!
If you can inform me it would be greatly appreciated!!!

Thanks

Brian

nm I found out that I need to go to the dealer because you have to run a tech 2 along with the programming... that way you dont delete your exhisting remote modules from the receiver...
What a pain...