Thanks Dom and Milhouse, both clever solutions.
I did have small bonehead mistake, my format was wrong, I had "arm_freq = 800" with spaces not "arm_freq=800".
After I figured that;
With arm_freq=100, he went very slow after.
Checked the log and BogoMIPS: 795.44
So I am on to a winner.
@danco, with it saving settings, its not the pesky write protect slide on the SD card?