[Quelty]

And yes, I have all the lines for these maps added in the all.ini file, I've checked and rechecked umpteen times, all the necessary folders for these maps are in the MODS folder as well.

Hi agracier,
To my way of thinking if you have all the entries in your all.ini file and they don't show in FMB, that would suggest to me that you have 2 all.ini files and the game is reading the one you have not edited.

Also you say all the maps are in the appropriate MODS folder, did you mean MODS/mapmods/maps folder? That is where they should be, eg the Sinai map should be in the MODS/mapmods/maps/dlv_Sinai folder. Also check that your all.ini file is in the MODS/mapmods/maps folder.

Cheers

Quelty