I was actually considering that option as well a few months ago, but I dropped it. After doing research on Indian medical schools, it became clear that the only thing they actually care about is MONEY MONEY MONEY. They don't even look at your qualifications! The only benefit I see in choosing this option is that you can get TONS of patients to do research on and you can complete it way faster. But then if you do decide to go ahead with this plan and return back, your degree wont be recognized and consequently you will have to write additional exam. 🙁 I don't think there are any particular courses that they prefer. At the end of the day, it's all up to you. You have to decide the road you take. If you are truly dedicated to become the person you wanna be then work hard and nothing will stop you from getting there 🙂
Also: I think you have to PAY some additional MONEY to reserve your seat in the NRI quota (?)
I'll be happy to help you if you need anything further 🙂