XBee sketch upload to specific device

Hi,

I have a scenario where I want to upload sketches to XBees that are connected to my central XBee coordinator. Using the tutorial [Wireless Bootloading for ATmega168/ATmega328[/b], it seems like you can only do 1 device at a time since the sketch will essentially be sent out in a multicast fashion. What I’d like to do is target specific XBees to upload different code to different devices. Has anyone done this with Screamer and is it even possible?
Ideally, the program should use the coordinator to ping all XBees and display they IDs so you can choose which one to upload the sketch to. Maybe screamer already does this but I wanted to ask ahead of time what its capabilities are.
Thanks.](http://www.sparkfun.com/tutorials/122)