For subconscious, I don't know, I am not neurologist.
For brain re-programing, yes, there are concrete research published on Journals dating as far back as 1945.
Basically these guys version of subliminal messages are, don't quote me I just saw their guy talk on TV, recordings that have positive messages and words on them. Your mind is bombarded over a period of 50 minutes with these messages.
After a few weeks you will find that these messages will eventually penetrate into your subconscious mind - and you will notice small positive changes starting to happen. As time goes on you will notice yourself becoming more and more positive. So yes subliminal recordings DO WORK!
However, in order to have these messages work effectively for you on a permanent basis you have to be aware of a few things. Namely
You have to listen on a daily basis.(VERY IMPORTANT)
You have to emotionalize and involve your feelings in sessions.
You have to use your creative visualization to see yourself as you wish to be.