Grab the BF Injection outside Toreno's ranch, or any vehicle at all, and go to Las Brujas in Bone County, right near El Castillo del Diablo. Stop in the red marker, and Toreno speaks to you through a loudspeaker. Choose between a Quad, a Sanchez or a Bandito, pick up the Rocket Launcher and get to the drop point. Head up to the top of Arco del Oeste. Stop in the red marker, and again, Toreno speaks to you via another loudspeaker. CJ lights the flare, signaling the chopper. Toreno then says the pilot is having trouble. Suddenly, two agency choppers appear and begin to attack.
Protect the contraband helicopter from the other helicopters. A health bar appears for the chopper. Shoot down the two choppers as quickly as possible, and more will arrive. Wait until they are fairly close before shooting, to ensure that you don't run out of rockets. The closer you are to the chopper, the more likely you are to hit it. You then gain a 2 star wanted level. The chopper leaves the scene and drops the package north of the Verdant Meadows Aircraft Graveyard. Go and pick it up. Toreno talks to you through yet another loudspeaker, and tells you to get the package back to Las Brujas. Stop in the red marker in the garage to complete the mission.