Oct1202 & sainI
--Question1: Is it ok to renew the old passport before 485 approval or do you guys see any problem in that??. Also will i be getting the same old passport after renewal or alltogether new one??.--
Yes Ok to renew, no problems, Depending on the Passport, if it is a Final Expiry, you will get a new Passport, if not then you will get the same Passport.
--Question2: How long does it take to renew and what documents i might need. --
NY Personal Submission, is Renewed same day, Documents, check their web site.
--Question3: Is it really safe to renew the passport before the approval and stamp on new passport.?? Is it technically/Legaly ok to do so.??--
Yes it is not only safe but adviseable, and yes it definately is Legal.