I have added an alternative rafter framing system for the 20' wide plans and details for doing gable and shed dormers.
It can be downloaded from the planhelp (membership) site at the link below:
http://tinyurl.com/9jynf - Scroll down to the third plan in this section of the download library.
(http://www.planhelp.com/public/images/dth38.jpg)
Note: with a little modification this system could also be used to frame the attic of the 2-story universal and turn it into living space. (You would need a dormer over the stair to continue it on up.)