I'm looking for a dungeon map addon that shows the map of the dungeon you are in when you press M, that shows where you and party members are in the dungeon. big map not minimap. needs to be compatible with carbonite quest.

That not possible withing the game API.

Your character never have any retrievable coord when in instance.

Since patch 3.1 or so you have been able to see you, your party, and your raid group in dungeon maps. The catch is that is only works with Northrend dungeons, and will NEVER be compatible with older content.

Using Carbonite, click alt-m to see the default map.