go here and download the manual, I did it and it was the easiest thing in the world! Took less than 3 minutes.

http://www.magura.com/7thsenseCMS/index.php?id=11239&no_cache=1&file=2431&uid=12585&L=1

You can actually shorten Magura hoses without rebleeding them. Just need a sharp knife and a new olive.