I did Columbia University's Postbac Program. Like myself, I have friends who are applying to both osteopathic and allopathic schools. Because the prerequisites are the same for DO schools and MD schools, and pretty much all the other admissions criteria is the same between the two, I would say that it does not matter which postbac program you choose to attend. What is important is that you choose the school that has the best academic reputation, as well as strong stats for previously admitted students. I don't know of any postbac programs in LA but you can look in the AAMC's Medical School Admissions Requirements and you'll find a list of many programs throughout the country. Good luck.