Hi, would love to help though a little out of my league i feel 
Im not confident you could do this with an arduino alone, due to having to read the protocol coming from the controller and parsing it back out to a PS
I did come across this instructable though, which uses a wireless controller via bluetooth back to a pc, and the PC handles all of the protocol translation, and then retransmits it to an Arduino using a wireless Xbee.
I am sure you could adapt this method to suit your needs