So I just started playing minecraft and decided to host a server for my dorm to play on.  Everything  has run fine so far but the maps are fairly bland. I downloaded ZOMG map creator and also OMEN to customize some maps for the server. my problem now is i dont know how to load them onto the server (basic server from the Minecraft website). How do i do this? I tried saving as "level".dat and replacing that in my world folder but no luck.