I think he's refering that to extend the max doodads or to remove the limit of doodads in a map..
You may use WEU (World Editor Unlimited[?] ~ which has no doodad limit) and only use it for doodad limit purposes. It is old and buggy, use it at risk. A chance of your map getting bugged with only the purpose of doodad limit is 0%, but using it with the advanced triggers WILL bug your map and will be unable to be played or opened..