Video:
http://www.youtube.com/watch?v=tDhHMtGTtbk
In words:
1. Start up server.
2. Open MapEditor
3.Click File --> New
4. Name of map, It doesnt save it so dont even bother.
5. Map Type:I would do Normal = 0
6. Revision, keep it at ''0''.
7. Map Size, Do what ever you want. I did 5 by 5 in my video. So do what ever.
8.Enable Scrolls, If its a jail map. Uncheck it. But it its not a jail. Check it.
9. Enable Map, YES you want to enable the map.
10. Base Tile, it what the tile is going to be all around. I did 3 and you can see its all grass.
11. Then go to File --> Save As. Direct it to you SEOSE or EoServ map folder. ''Name>Desktop or Documents>Seose or EOSERV>Maps. Save as.. 00279.emf Then click save.
12. Reboot. Go online. And goto. +goto 279 1 1
And thats my guide. :D