Welcome to the Cafe.
finalplayer, eh? I guess at this late date you just may be that.
The short answer to your question is, press and hold CTRL key while typing editor. This turns the editor on. Remember when you are done to turn the editor off the same way. There is no visual change in the game when eht editor is on. I usually test by hitting the z. If the editor is on that should bring up the bulldoze tool.
There is a ton of info on using the editor in the Scenario Editor /User Scenarios
section of this forum.