well this I got from YouTube,f or those who don't know already,. u can play ur own music in the mixtape radio option while driving a vehicle....simply go to your any of ur default music player (play music preferably) and create a music playlist with songs of ur choice....name the playlist "GTALCS" ...now open ur gta lcs and while driving a vehicle, swipe the bottom left corner where the radio option is till u get to mixtape ....ur music will begin playing, hope this helped