Instructions
Play through the game until you complete the mission called "Dress to Kill." You will receive two phone calls after that, one from Dwayne and one from Playboy X. They will each ask you to kill the other person. Go to the "X" on the map to kill Playboy X.
Check your e-mail at one of the Internet cafes approximately one day after you kill Playboy X. Dwayne will have sent you an e-mail, so respond positively to it to become friends with Dwayne. Wait for a phone call from Dwayne before you can begin hanging out with him.
Call Dwayne to perform activities with you until he is above 75 percent in the "Like" stat. Dwayne is happiest going bowling, drinking, eating, going to a show or going to a strip club, so focus on those activities.
Select Dwayne on your cell phone after you have raised his "Like" stat to at least 75 percent. Select "Backup" and call Dwayne. He will send a car with two armed gang members in it to your location as backup.