You can mod Fallout 3 so that maps are different, you can make new quests, and much more. Modding is the only way to get the Floater and Wanimingo files out and putting them into the game. You can also mod weapons and people. You can make new weapons altogether with unique shapes and people with unique shapes. You can put different coloring onto creatures, weapons, Items, and scenery too. You can change Fallout 3 to almost any way you want it to be.