I don't know exactly how... But, after screwing around with it enogh -- I have now overclocked to 800. The max WAS 550. I just un & re-installed the app (setcpu) rebooted and ... viola, done.
Anyone having problems with this -- don't ask me for help. I made a 15 step process into a 178 step process. However, I am comfortable taking it back to stock, wiping and reflashing - as I read somewhere that flashing too many tomes will jack you up if you don't wipe.