Korean names help on spelling?

technically, I think it could be up to you. I have had times when I say "Jaejoong" and other times say "Jae-joong". If the person you are talking to it familiar with that person/performer/actor then they should get it when you put their whole name together. If they don't know much about Korea(n) then I just say it together anyways. Won't be going around saying "Bo-A" though, that is for sure =P