Sketch upload to Arduino Mega 2560 via Xbee

Hi Everyone,

I realise Xbee uploading of sketches has been posted before but they all seem to have gone stale. I've been trying to upload sketches to my Arduino Mega 2560 via Xbee following this article:

I'm able to program an Uno and a Freetronics Twenty Ten from both IDE v 0.22 and v 1.0. I'm running Windows 7 64-bit. Basic serial I/O (i.e. println) works fine.

I've googled a fair bit and it seems that its pretty common to have issues with getting this to work with the mega 2560. I'm wondering if anyone has managed to get it working?