I'm looking at a few schools
right now. Some schools truly only care what your grades were in important classes like A&P, chemistry, etc. They don't care if you got a C in art history. Seems most places want a B as well, not B-, B. One school even told me I wouldn't get a second look if I didn't retake a course to bring it up to a B from a B-.
I got 1200 on my GRE (old format) which should give me some leeway in having B's instead of A's but it won't help schools overlook the fact I didn't have B's in the courses where they wanted 'em.
Retaking courses is probably the only thing that will help you. Get some extra certifications and what not to help your application pop out, but without the basics like grades and experience you really don't stand a chance in such a competitive field. If you've got the drive, retake the courses. It ain't that bad. Better to tough out a few classes instead of regretting put the work in for the rest of your life.