You will again have to do your Class 1 initial medical examination at one of the three centres (Delhi, Bangalore or Jorhat). Alternatively, i think you can also do it at the Private centres in Bombay and Delhi (Not too sure of that)
But you will need to apply for an NOC first to DGCA.
My opinion :
Take a date in Bangalore or Delhi (Address and contact details on DGCA site)
Once you get a date for initial medical exam, apply for NOC (Details for application , given on DGCA site)
Once you get NOC, apply for PMR forwarding to DGCA, atleast 10 days before medical date.
So, there you go.
PM me if you need any clarification.
Cheers.