radio question

I know this is been said before but I need to know what do I have to get inorder to use the steering wheel remote with an aftermaket radio? Where would I get one? Thanks

I believe this is what you'll need..

http://www.go2pac.com/products/swi.htm

Yea, the PAC SWI-X is really easy to hook up. You just hook the power and ground and then the white wire to the yellow/red wire and ground the yellow/black wire that plugs into the back of the radio and program. Programming is really easy too. Just one thing to remember. If you want to change one function, you have to reprogram all the functions. But after you do it once or twice, you'll have it down. It really is very easy, don't let people tell you otherwise.