Are you looking for a way to generate multiple schemas? I've previously posted a way to add explicit schema names using custom properties (see http://www.ormfoundation.org/forums/p/573/1698.aspx#1698 for the end of the thread. Minor batch file adjustment will be needed for VS2010/VS2012).
The transformation for adding schema names is much more involved than this one because schema is a parent tag of table in the XML representation, so a major document restructuring is required to do this. The schema name is not just an attribute of the table or a tweak of the name itself.
PS The readme for the latest version just says that the schema name (emphasis on 'the', meaning one-and-only) generated for the model could be customized and remembered, like the customize-and-remember feature for table and column names that I added last year. I threw this one in because it was an oversight, and because I was having problems getting a web-hosted postgres db to accept any schema other than 'public'. I guess this is the privilege of both developing and using NORMA: if something small annoys me during use, I can fix it myself:)