Like pretty much every year, the nostalgia kicks back in and i find myself playing C&C Zero Hour once again

Now I'm planning on editing some generals, units etc. and got some questions:
1. How can I change the name of a general? (e.g. changing "Air Force General" to "UK"; or "Tank General" to "Russia" and so on...)
2. How can I add existing units/buildings to another general? (e.g. adding the Crusader Tank to SuperWeapon General; or adding Scud-Storm to AirForce General etc..)
3. When I add a unit/building/promotion... to another general, does the Skirmish AI use that new stuff?
4. Am I delusional and those stuff is far more complicated than I assume?

Got no experience in modding, what I know so far is that i need Finalbig

Would be very thankful if someone could help and maybe give some tips, link tutorials etc.
Thanks!