I know there is Morrowind Map Replacer but it's incompatible with MCP so it's out.
I've tried to remove EnableMapMenu function, but it's interrelated with CharGenState global var. When the variable is set to anything else than -1, the map can be disabled. Unfortunately, the side-effect of this method is dissapperance of the SAVE option in menu.
Any suggestion to get this wrokin'?