AC Mappy is a Decal plug-in for Asheron's Call that allows users to display a map of the dungeon they are in on screen. Its fairly straight forward. Install it and away you go. When you enter a dungeon a map will automatically pop up (assuming that "Auto-Show" is checked) if you have downloaded the appropriate dungeon. Unfortunately at this time the program does not remove the map when you leave the dungeon. This will be implemented in a future release. As for now you need to either type /sm (or @sm).