From what I've seen the songs are broken down to their individual guitar parts. For instance, a song might contain two rythym players and one solo guitarist or visa versa, so the instructors do individual lessons on each part. In the lesson structure you'll see guitar 1 and guitar 2 and Lead 1 or Lead 2, So just pick out a song you like and play the part you wanna learn.
Hope that helps,,
Moe