StrategyPage offers it's analysis of what the first stages of a war between India and Pakistan might look like -
May 14, 2005: Can India ever fight a war against its nuclear armed neighbor and rival Pakistan without provoking a nuclear holocaust? The Indian Army (IA) thinks it has an answer to this question. Until now the India's doctrine for war against Pakistan consisted of combat divisions advancing across the Rajasthan desert border into Pakistan, eventually cutting off Pakistan's population centers in the north from the only port and economic lifeline of Karachi...
(click quickly! Stratpage's permalinks are notoriously not so permanent)
Interesting reading if you're of a macabre / war-nerd sort. Personally, I'm an optimist and believe that, short of an improbable Pakistani state implosion, a Hamiltonian peace will be the long term outcome between the 2 nations. Of course, the path from here to there is rarely a straight line.



