Take a look at many of the shell defined files in the PRJ like USERSTAR.BWD or INSTMAP1.BWD, you will see they all have the same tag: FE FF.
This is a very special, important tag. If you didn't have that tag, you could never play the Trial of Grievance maps. You could never select a mech of your pick, nor your starmates.
I was experimenting a little bit, and found some really backing data:
- In temporary mech stars like USERSTAR or ENxxSTAR, you will find that the .MEK file in the GPS.d (Game Piece Spec) in the star specific BWD to always be FE FF, which tells the sim to use a .MEK file in the MEK subdirectory of where you installed Mech2.
- In the SCN1 files, you will see the same thing; a shell or external defined file such as USERSTAR.BWD, which is the file that lets you freely choose your mech.
- When the file tag is set to FE FF, that tells the sim that there is an externaly referanced file, and will require to specify the name of the file you wish to use.
Thats what I CAN confirm, I assume but can only theorize so far that a type of NAIS could be reborn for 31cc or GBL.