Hi, Getting long Visa's for Iran is difficult, and getting long extensions is sometimes difficult also.
It is hoped by all that the situation between India and Paksitan will blow over as opposed to blow up.
If your in no great rush, then the situation may present you with the ideal excuse for having an extended stay in Iran. You should be able to twist somebody's ear long enough to get a 2-3 month stay once your in the country given the tension between India and Paksiatn together - and its a big country and very cheap.
Just a thought ;-)