keeping the stearing wheel controles

hey guys i have the steering wheel controles on my 08 but i am getting a new deck from the wife for x-mas( or so i hope ) any way is there a way to keep them working with the new deck? thanks

 

http://cgi.ebay.com/PAC-SWI-X-UNIVE...tegoryZ60208QQihZ017QQitemZ270161846044QQrdZ1

This is what you need. I would suggest going to the manufacturers website for the wiring diagram as it is a lot easier than the one that comes with it. I have this in mine and it works well.

 

I have this too but I dont know how to hook it up... Im confused about the whole resister thing and where/how to hook it up... Do you have any tips to installing this???