I dont think you can run a menumode specifically for the World Map tab of the PipBoy. I think you will have to settle for something less specific, unless the command is out there, just not listed on the wiki. Anyone else know?
As far as I know, there's no way to be sure that the player is looking at the world map. It might be possible to determne if you use FOSE's UI functions though.
Hmmm. What if you tried detecting when a menu was pressed that wasn't either of those two? Like if they are in pipboy, but not in Inventory or Stats. Then at least they would have to be in the Data (right button) area of the pipboy.