RIM is a public domain package out of the University of Washington. I only
know of the users' manual. It is possible that the U of Washington folks
could tell you about a tutorial as well. There used to be an ftp site for
RIM, but I'm not sure if it is still being supported. You might try writing
to the developer, Jim Fox. Last email address I have for him is:
fox@cac.washington.edu.
Marji Larson