But when you download a map from the internet, it (mostly) don't automaticly put it in the map section of Generals (Zero Hour). Normally, if you create a map with the WorldBuilder, it automaticly creates a new folder with your map files inside.
It is rather easy, so you can't do much wrong here.
After i have read a topic about someone who didn't know where to place his maps, i thought i may make a tutorial about it.