Couldn't be much easier for 2v:
http://www.ducatisuite.com/beltchange.html I've used the 5mm/6mm allen-key settings for a year now and never had any problems. Be careful with torqueing the tensioner bolts up though as the alloy feels a little 'soft'.
You will also want to check them after a few miles to make sure they've bedded in without generating too much slack.