"• If you need to stop immediately, the vehicle can be controlled by stepping on the brake pedal with both feet using firm and steady pressure. Do not pump the brake pedal as it will deplete the vacuum utilized for the power brake assist."
okay. First the gas is stuck and therefore the car still going at speed, so by appling the brakes this would heat those brakes very quickly and possiably burn them out before the car comes to a stop if it actually does, remember the gas pedal is stuck so the car is still wanting to go.
"• Shift the transmission gear selector to the Neutral (N) position and use the brakes to make a controlled stop at the side of the road and turn off the engine."
Should this not be considered the first step? In a manual this can be done easily by pushing in the clutch and putting it into neutral. With an automatic I would think it would be more difficult and could cause massive transmission failure that could result in not even being able to get it in neutral.
" If unable to put the vehicle in Neutral, turn the engine OFF. This will not cause loss of steering or braking control, but the power assist to these systems will be lost."
Once again I think this should be considered first or second in the list. Correct that the power assist will be lost making for braking and steering diffcult but not impossiable. Most cars I have seen have an emergency brake that is manual and not assisted by anything. Hence "emergency brake". Is this not an emergency?
I'm thinking cut the the power to the car by shutting it off, but not locking the wheel, apply emergency brake (even pressure here, just don't yank it up) and bring the car to a stop. Plus since the emergency brake has no power assist to begin with you can pump it (most emergency brakes I have seen are cable operated and as such do not use the brake fluid to apply the brakes) so when, heaven forbid, your in this situation going up down hill, mountains, and/or corners you can pump the emergency brake to help control/navigate the car till it comes to a stop. You bypass the possiablity with applying brakes to car whose gas pedal is stuck and still want to go and burn the brakes out before the car stops and bypass the possiablity of depleting the vacuum utilized for the power brake assist.