to get maps to work in the addon "entrenchment" at present, you have to open the file 'galaxy.manifest' with notepad in the entrenchment folder.
add the maps filename with the same 'fileName "'at the start of the line and a '"' at the end of the line
repeat for the maps you want to add
add the number of maps added to the number at the top of the file and save it then run entrenchment
hope this is explicit enough for you and that it works
harpo