SBF isn't too difficult. All you have to do is get the drivers for your computer, install RSD and the patch, extract the sbf, open the sbf in RSD and hit start.
There are directions
here towards bottom at the header: "Return your DroidX to stock unrooted 2.1"
There's no reason to not get v1.0 either, you would install it the same way you installed RC2 this last time and turning off the OC is extremely simple although I would leave it because he only has it mildly overclocked and so it should be very stable.
Does anyone know if it matters whether RSD 4.7+patch or 4.8 is used for installing the 2.1 sbf or the 2.2 sbf? Can you use either version with either sbf?