What you'll have to do is firstly get an appointment with AFCME, New Delhi or IAM IAF Bangalore. I prefer you get that appointment by filling up a form easily available on DGCA website and speed posting it.
Second, you have to obtain an NOC from DGCA (Safdarjung) for renewing your medical (Form also available on DGCA website). I am pretty sure you have to do your initial again (lapsed initial as they call it). Do this only after you're certain of the appointment date.
Third, after you've received a confirmation for appointment, fill up the PMR forwarding form and speed post it. Make sure they have forwarded your PMR which can be checked on DGCA website as well.