at the rate of two weeks at a time could take a while unless you plan well. do all your study for cpl conversion exams out in the US or wherever you are (unless you like to be spoon fed like most i've come across), get someone to apply for a computer # in the mean time, if you dont have one already, and for the tests itself. travel to india and take the exams (don't forget about RTR), hope n pray you pass, apply for the actual conversion and make sure you don't miss out on any reqd document coz those babus can come up with just about any excuse not to approve your application. And yes, get a class -1 medical in hand prior to any of the above. it's unnecesarrily a long and painful process.
good luck!