Wireless Control

[Data33]

Hi!
I'm thinking about making a wireless snes controler, and since I have almost no experience whatsoever with electronics I thought I might as well ask people who know more than me.
I do know about those Messiah controllers, but I really want to build something myself.
Now, I have a few questions about this.

I have noticed that there are 5 (I think) cables in the snes controller, and I think one of them is +5V and one is ground. Some of these cables must be handling the data sent to/from the snes. Would it work if I somehow managed to transfer this signal between the snes and the controller, and using batteries for the +5V?

Also, what kind of components should I use for this? IR, this 2.4Ghz thing?

Thanks in advance!
Data33