check out the stories of the previous successful applicants, which u could d/l from CD. One gal whose background is alike yours got into HBS!
How to select schools really depends on what you want to get out of the MBA, and what your learning pattern is! Do more research, and talk to more alumni at the forum! it might help...
hehe, I don't know then, I guess what you did doesn't matter that much in your application because an MBA degree is useful to anyone in a managment position in any industry.
The key is why MBA. You may wanna bridge your past experience and your future career plan by an MBA degree. Tell the admissions officer a sound story.