Start the game from the "
main" menu
, you will see the "
Play SPWW2"
in the bottom right corner. Start the game, once the selection has loaded you will see an "
editor"
button on the menu to the right, choose it and the editor screen will open. Load your map by choosing the "
custom"
button under the map selections and all the rest of the options should be self explainitory. There's an info bar on the top of the screen that will help you figure out what the buttons are for
. Move your cursor over the options to get the info for each.