These instructions are out of date. The MOC now runs on different software and there are different processes to setup your Signature (and pictures and Avatar and etc.)
There is an Forum Posting 101 topic here
http://www.montanaowners.com/forums/...ad.php?t=70323
Lots of good information but posts #23 and #24 specifically address signatures. Take a look and let us know if you need further help.