pal vs. ntsc (i dont know if india uses pal or ntsc).
regional codes on the dvd player. (your HTIB is meant to be used with dvd movies purchased in the US which is region 1. the region of movies sold in India will be different and will not work in your sony.)
there are probably other things that i can't think of right now.
I am moving to India at the end of the month and hope to purchase a Sony DAV FX-900W Home Theater to take with my. Besides bringing a voltage converter, will there be any other pieces of extra equipment that I would need?