3rd creature grade from EWA

Hello, I have been playing with the EWA mod for a long time, where there is a 3rd creature grade available only in forts, and I would like to ask a few questions:

• Can I move the recruitment interface from the fort to the creature upgrade button in the town?
• Can I put this into a separate mod that works independently of EWA and other ncf creatures?
• Humans have 2 additional grades in this mod; can I add new grades for the rest of the Factions to the mod?