Hi Cykaraky! Better to renew your passport now. 2 weeks lang naman ang passport renewal vs 30 days na binibigay ni CEM to submit passports.
Mahirap kasi na baka abutan ka ng 6 month validity for travelling saka ang ibibigay lang ng CEM is 1 year validity from your medical exam. So kung January ka nag pa medical, January 2016 ang VISA expiry mo pero since mag e-expire ng May 2016 yung passport baka ang ibigay sayo is less than 1 year. Baka magahol ka sa preparation etc.
You cannot give your present passport to CEM kasi bubutasan na ng DFA yung old mo. Hindi mo na siya magagamit. Di puwede more than 1 ang passport