Next Question: 433Mhz type tx/rx?

[TeamTEOR]

I did an "Instructable" on how to use the MP3 trigger with a Arduino and a WiFi module (that has the same pin outs as an XBEE). Maybe that will help with your setup as the XBEEs are just about the same, if not it may give you a place to start from.

http://www.instructables.com/id/Sparkfun...Made-Easy/