Step #1: Have this Mod installed (FC Thin..SAS Switch v3.1
Step #2: Determine what squadron you want to add....(For example: Fictional Squadron RAF99 Code ZZ)
Step #3 Save a copy of the FC Thin Mod (in case you really screw it up)
Step #4 Go into the Mod, and go into the i18n folder. Go into the regInfo.Properties file, and open with word pad. Go down until you see "gb01 United Kingdom Army - <none>". Scroll down a few more lines until you see "318LW 318th 'Gdanski' Recce-Fighter Squadron". Look at how the squadrons are entered....
Like this:
113Squadron 113 Squadron RAF
enter you new squadron the same way.....
99Squadron 99 Squadron
The squadron codes will be added later.
After you finish this step, repeat the same thing in the regInfo_ru.properties file, the regShort.Properties, and the regShort_ru.Properties file.
Step #5. Go into the PaintSchemes folder in the Mod and go into the Cache folder. Copy one of the files in there to your desktop, and rename it 99Squadron. Return this file to the Cache folder.
Step #6. In that same PaintSchemes folder, go into the folder marked Red. Find a tga for a known RAF squadron that does not have a squadron image inside. Copy this tga file, AND the matching "file" file, to your desktop. Rename the tga and the file file to 99Squadron.tga and the file to 99Squadron.
Open the "file" file with wordpad, and you will see something like this:
country = GB
id = QJ
gruppeNumber = 1
speech = GB
short = 92 Squadron
info = 92 Fighter Squadron
Change the id to ZZ (the squadron code of squadron99), and the "short", and "info" to : 99
(don't forget to save before closing all files)
DONE!