I started making some submaps to clean up my dude, but it seems i Cannot move a device into the sub map. I must add a new one and delete the old. Any ideas. Maybe I am just missing something.

Ctrl-c and ctrl-v will copy and paste but I have had poor results when using them.
I would recreate the devices... Although I have not copied and pasted in a few releases maybe they have improved it.

OK I see, it works within a map but not from map to submap.

I take that back. You have to click the background first after moving to the submap. EASY