When you compiled your map Radiant created a file called 'yourmapname'.bsp. It usually creates this file in main\maps (or mainta\maps). If you want to play your map in multiplayer (for example dm) put the .bsp file in the main\maps\dm folder. It should then show up in the multiplayer maps in MOHAA.
If you want to play it in single player leave the .bsp file in main\maps, when MOHAA loads open the console and type 'maplist'. Search for your map and double click on it. It should then load. You need to make a script if you want to play your map with weapons using this way.
Also, make sure you have an info ---> player ---> start in your map.
And welcome to .map
