@Igor Ruzaev, thanks for your "help". Let me be the first to say you're a real asset to the Head Fi forum! For your information, I did read the manual posted on xVortex's site before I asked my question. He gives clear instructions on how to Rockbox the X3, but I didn't see any specific instructions for the X20,,, So, if you will kindly step aside, maybe someone else can provide a more helpful answer. Or is this no longer allowed in this thread?? I guess I'll just ask xVortex thru a PM.