I am not at home and I don't have IL-2 on my laptop so I can't check my game or extracted SFS Files
So I will Wing it

If there is a MTO_Lite map and it loads up ok, then the load_light.ini would be in the SFS Files
Most likely with in one of the HFXMaps.SFS files(or whatever there called for the HSFX SFS Files)
The SEOW guys changed a few default maps like Okinawa ete for there HSFX package the use.
I imagine that the MTO may have been changed a bit for there specific use for SEOW like Okinawa was.
UP is based off the HSFX SFS Files so a lot of stuff like that was already there and in the SFS Files
With maps we have just added maps mainly and everything that has been added for maps by us at UP
is located in the Files/maps directory
The reason the FMB map list names may be different than the all.ini entry's
is because the FMB map name list actually comes from the maps file in the Files/i18n folder
(or whatever that folder is called lol )maps_RU file maybe for the actual file name
The FMB will show the all.ini entry for a map name ,
except when the map name has been amended throught the maps_ru file
This file in the i18n folder is mainly for taking underscores out of map names ete
all.ini entry is My_Map and in the maps_ru file(again from memory which is not a good memory)
you can get rid of the underscore to make it show as My Map in the FMB
Open the file and it will show as the all.ini entry is in the left column and the amended name is in the right column
I will investigate the load_light.ini for the MTO tomorrow night when I get home and can check my game and files
