MRBS need ability to have more than one instance

I'd like to be able to install mrbs in specific courses instead of just once system-wide. While the "default" set up would have all courses in a school reserving the same set of rooms or materials, there are times when a specific classroom might have equipment to use. Another instance would be where the top level is not one location but a group of locations (school district) and courses are schools..This would be another case were multiple instances would help keep options separate and unique.