Radar observer recert

I am currently upgrading from 100 tom master to 500 ton master. I have radar observer that i received 2002 and expired in 2007. I never sent the certificate to be placed on my mmd for the reason that 100 ton do not require radar observer. now that i am upgrading i need that certificate so the question is can i get a radar recert then send both certificates to the [B]Evaluator and along with all my other certificates and be ok, or do i need to go and get the 5 day original radar observer all over again? [/B]