The streets are pulsing with tension; Sollozzo and his pet-cop, McCluskey are calling a meeting...
Michael Corleone - a prodigal son fighting his destiny
You've got to stash your weapons in Louise's Restaurant (Midtown) before getting to Sollozzo. You have 4 minutes to do the job. Simply avoid crashes and longer stops. When you get to the spot, enter the alley and head to the back entrance. Kill three gangsters on your way. Raul is standing near the door. He won't let you in. Struggle him a little and he will let you in anyway.
Get inside and go to the toilet, do not stress yourself with enemies. After planting the weapon watch a cut-scene. When it ends, go out of the diner and run as fast as you can to Michael Corleone's car. You've got to drive him to Hell's Kitchen docks. Go there swiftly, watching out for gangsters pursuing you. The target - a ship leaving to Sicily - is located near the sign pointing Little Italy. After getting Michael to the ship, watch a cut-scene.
Dario showed up nearby, he tells you that Tom Hagen is waiting for in Falconite in Little Italy. Head there. You'll be informed that the family wants you within its structures. Approach Don Vito Corleone standing nearby. Watch the ceremony, then talk to him once more. Answer the phone - Frankie calls you to your apartment in Midtown. She says, there's a surprise waiting for you. There's nothing more to do except fulfilling your wife's request.