lol.. making maps is absolutely nothing like rpg maker (btw rm2k, rm2k3, or rmxp?) There is a guy working towards making a similar style map making utility for RO but it isn't anywhere near completion. If you would like to give it a go follow this Link.
Be prepared for some serious headaches and hard to track down programs.
There is no need to "make" new maps. You can just use un-used maps or even copy and re-name some used ones. Many cave maps would match the theme and do the trick
Lol, alright. I thought it would be like rpg maker. Well I have no idea to do programming. Nothing compared to C++ anyways. I have a little bit of experience using visual basic, but that's not going to cut it with map making.
If they make a tool that you could use to make the maps then that'd be great. But then of course everyone would be making their own custom maps for the game. That'd be pretty cool actually. A completely customized RO