Having no minority characteristics myself, I was not in MSP at R-N. I am however, going to be a 3L there in the fall so I'll give you what information I have on the subject.
There are many who believe that participating in MSP really helped them. From what I understand, it is a substantial time commitment. I'm not sure if its for each of your courses or for 1 per semester, but you'll have a study group led by an upperclass facilitator who got (and don't quote me on this) a B+ (might be A- though) or better in the course that they're holding the study group for, and they took the course with the professor that you have. They outline the course with you, and work with the professor to do so. Toward the end of the semester they will give you a sample exam question and they grade your answers according to what the professor looks for.
To be completely honest, I'm not sure how helpful all of it is since, as I said, I was not a part of the program. Therefore, I'm also not sure how much help this post has been, but if you want, I can attempt to put you into contact with someone who did participate. Either way, I'm assuming that I will be seeing you in the fall, so enjoy the rest of your summer and see you in August.