any way to disable hyper-threading from CLI?

[mike d. kail]

i was hoping i could disable this via OMSA, but i haven't been able to 
find anything that says that [and am hoping i simply missed it]

here's what 'omreport chassis processors' currently shows:

Processors Information

Health : Ok

Index                  : 0
Status                 : Ok
Connector Name         : PROC_1
Processor Manufacturer : Intel
Processor Family       : Xeon
Processor Version      : Model 4 Stepping 3
Current Speed          : 3200  MHz
External Clock Speed   : 800  MHz
State                  : Present
Core Count             : 1

Index                  : 1
Status                 : Ok
Connector Name         : PROC_2
Processor Manufacturer : Intel
Processor Family       : Xeon
Processor Version      : Model 4 Stepping 3
Current Speed          : 3200  MHz
External Clock Speed   : 800  MHz
State                  : Present
Core Count             : 1


and i want to change the 'Stepping' value to be 1

thanks
/mdkail