If you do not know how to open the mission editor-
1)Do nothing
2)Do nothing
3)Do nothing
4)Do nothing
5) Copy n paste C:\Blockland\Blockland.exe -mod editor for Vista, C:\Program file\Blockland\Blockland.exe -mod editor for XP or C:\Program files(x86)\Blockland\Blockland.exe -mod editor for windows 7 into the target box of the desktop shortcut. Sorry, but if you have a mac, you suck and will never make maps.
6)Do nothing
7)Do nothing
8)Do somthing.