I don't think CA released the full mod tools that lets our beloved modders open up minor factions to play.

:(

that and if it was possible i would have no idea how to

unfourtetly ilkhan i dont think thats possible yet

Could you make this it's own unique playable faction like either the minor faction Bahariya or Farafra? That way we have the regular Sherden but also a unique playable Libu faction.

i have no idea as i havent playtested this mod much
if you endup finding out i wouldnt mind adding the info to the desc

are you still able to recuirt foreign units? like for example you are fighting a hittie faction and you wipe the floor with them can you recuirt them after you defeat them and take territory in that region?

i put it as sherden because of the horde mechanics, if i knew(or could) move the sherden start postion to the western desert, i would.

Interesting mod, but not realistic. The Libu Units are very nice but it makes no sense to add them to the Sherden and Anatolia.
Maybe think of a Mod with one of the many Egyptian "generals" transformed into Libu (playable Faction) with its specific Units (many are already present) also using the Units of this Mod as a basis.
And starting from the right territory, that is, west of Egypt as Farafra or Bahariya .