How can you listen to songs in 18 wheels of steel haulin

1.first you have to make sure your song are in oog format if not convert the song
2.then copy and paste your songs into My Documents\18 WoS Haulin\music
3. then go into the game and and press r and a box wit all the music you put in it should be in it then just click on the play icon and press r again to close the box
your done