[Adrynalyne]

I don't see a need to add this step because

1. Its the same process as the beta rom. Being that you need that rom first, if you don't know how, you aren't ready to flash this.
2.
In your phone settings, switch the USB connection from active sync to sync with Mass Storage. Then turn off your phone until later.

Not a needed step. Aside from turning it off, of course.