I hate to be a bringer of bad news, but I just don't think that's a realistic hope. I found this on the AAMCAS website for post bac info. It relates to Rosalind.
"Completion of the M.S. program with a B average or better qualifies the student for the M.S. degree but does not automatically qualify the student for entry into any other University program including the medical school. However, successful graduates of these programs are encouraged to utilize their academic records in these programs to support their applications to medical schools or other graduate programs."
I haven't heard of any post-bac programs offering guaranteed admission to a med school. I have heard of a guarenteed interview, but that's obviously not quite as good.
One thing I will say for post-bac programs though is that their goal is to get you into med school. So, the one I'm in pays for tons of tutors, a Kaplan MCAT prep, and even some special, smaller class sections to help us get great grades. Around application time, they give tons of advice on how to best apply to med schools. So, I think they're worth it overall.