To answer:

MOVIE:
- Cicci is one of the guys who escort Tessio away.
- Neri is the guy who dresses like a cop and kills Barzini.
- Rocco kills Paulie Gatto.
- Rocco is the guy who gets shot at the airport after killing Roth.

BOOK:
- No one in particular is mentioned when they take Tessio away (not 100% sure on this)
- Neri still dresses like a cop and kills Barzini.
- Rocco still kills Paulie.
- Obviously Part II isn't in the novel so nothing with Roth happens.

Wayne

"Finance is a gun. Politics is knowing when to pull the trigger."
Don Lucchesi