Protecting you handset from FROST attacks?
Looks like my answer was on that page all along:


  15) Flash the frost.img file from our download section to the phone: 'fastboot flash recovery frost.img'. For this command to work, the bootloader must be unlocked.


So, to other semi-paranoid android users out there, know that protecting against cold boot attacks is as simple as locking the bootloader (if you haven't already). You can do so via fastboot.