Well, the only thing that is coming to my mind is my lil local CC down here only takes a GPA for specifically the nursing pre-reqs, they don't care what the rest of your classes look like. If you have a program similiar to this in your area, maybe you could focus only on those classes, retaking the C's via distance or night courses even, and bring up your GPA to B's and A's in those particular courses?
For instance my CC wants 10 pre-req courses. (English 1301, Intro to Psych, Human Growth and Dev, Nutrition, a humanities elective, Chemistry (or Biology) I, A&P I/II, Microbiology, and Interpersonal Speech.) They award extra points to your admission to their nursing program if you take the courses *at their school.* (which is no hardship, it's not an expensive school or anything)
I know that sounds like working backwards, and very frustrating, but if you're out of options and really want to apply to nursing school, that'd be my plan of attack, aim for an ADN first to get your foot in the door. Email all the programs locally that have ADN's, or research on their websites how exactly they determine admission criteria, and go from there. (I'm suggesting ADN because BSN programs are possibly going to count all your grades, or use two different GPAs, the nursing pre-reqs and the 'other' courses.)
I understand what you're saying about the difficulty of your other school, but even adding .5 to a 2.0 in a science course isn't generally high enough for the nursing school to accept from what I understand. On a bright note, you should have absolutely no problem getting 4.0s outta every course you retake, should be a breeze for you.
P.S. I have 60+ credits myself, also from a gorgeous private college, but I'm in a similiar situation, my old 2.0s have gotta be retaken. Woulda done myself more of a favor if I'd never gone previously and started with a clean slate...