great idea! I think you'll find the rhythms can be alittle more complex then they seem at first glance, Johnny almost always played a bouncing bass line with in the chords. kind of a "boom-chukka boom-chukka" sound. I can't think of the song you mentioned off hand but it will come to me. besides all the standards like ring of fire and folsom prison blues I suggest you learn: Cry, Cry, Cry, when the man comes around, it ain't me babe & Cocaine Blues. those are my favorites and you can rock em out abit. infact teh song you mentioned may be cocaine blues....