Disable HyperThreading OSX Lion

I keep hearing back and forth about HT even though Steinberg still appears to recommend disabling it. From what I read on other forums SL users disabled it using some applications that came with the Apple Developers tools. I now understand these will not work on Lion. I did find this, and am looking for the forums two cents:

. . . you can permanently disable hyperthreading by issuing the following command in the Terminal:

sudo nvram SMT=0

To re-enable hyperthreading, use the command:

sudo nvram -d SMT

Changes take place on a reboot . . .