Hi all, I am currently applying to MD only programs but I want to be explored to some research too, and may consider the MSTP stuff if I am really into it. I wonder if it's really hard to do so?
You'd have to talk to schools about the chances of managing to get into the MSTP program once you've been enrolled in the MD program. I have a friend who tried to, but was turned down every year he applied. He'll have an MD-PhD when he graduates, but did not receive anything close to the funding that an MSTP student does.
Uh... no offense, but the MSTP (or M.D./Ph.D. programs) program isn't for people that just want to "explore" research. You won't get accepted if that's your motivation for applying to the program.