You need 2 programs 1) Nero Burning Rom
2) Alchohol 120% or Daemon Tools
First compile a cd in Nero but instead of writing to audio cd burn an image to your drive. Then mount the image in Daemon Tools or Alchohol 120% and read the mounted image with Rockstar Custom Soundtrack program hey presto you can listen to all those LEGAL downloads in GTA LCS.
This guide was written at high speed post if u get stuck