A tweet by loonyboi has word that a new version 1.4 of the Garden of Eden Creation Kit (G.E.C.K.) is now available for Fallout New Vegas, and those creating custom content for Obsidian's action/RPG should update to the new version after applying the just released patch for the game. Word is: "The G.E.C.K. provides the community with tools that will allow players to expand the game any way they wish. Users can create, modify, and edit any data for use with Fallout: New Vegas, from building landscapes, towns, and locations to writing dialogue, creating characters, weapons, creatures, and more." The G.E.C.K. Wiki provides more help with this.