Well, it turns out that there IS no user's guide to EM2 but Anita at the EM forum pointed me toward the EM1 file with a suggestion for how to update the contents.
She said:
"You can download the user guide for V1 from
http://www.microsoft.com/downloads/details.aspx?FamilyID=DD27D551-AFDA-41B2-9332-CE958ABE7435&displaylang=en. Then just print out the help for new features. That would probably be the easiest way to go about what you want, since V2 uses strictly the help files."