Prime Rib - new recipe

Well, I'm in the planning stages for cooking a Christmas dinner in Hawaii. It is always hard to cook a big meal in someone elses kitchen, much less a condo we have never been to before. So, we will see how this goes! I found a new recipe for a "foolproof" way to cook a prime rib. So, today is testing day - I'm testing out the new recipe to see how it works. It goes something like this...

Step 1: Preheat the oven to 375 degrees for 10 minutes.
Step 2: Season the roast with a mixture of seasoning salt, garlic salt; Emeril's Essence; and onion powder; (equal parts). Press the spices into the roast.
Step 3: Put roast on a rack in a roasting pan. Put it in the oven.
Step 4: Set timer for COOKING TIME... To figure your cooking time, it is time to multiply the weight of the roast by one of these numbers (dependent on the amount of done-ness you want). 5 (very rare); 6 (rare); 7.5 (medium rare); 8 (medium). For example, your roast is 5.0 lbs, and you want it rare. You would multiply 5.0 (weight) x 6 (rare) = 30 minutes cooking time.
Step 5: Once your "cooking time" is over, turn OFF the oven - DO NOT OPEN THE OVEN DOOR!!!!! Set your timer for TWO HOURS.
Step 6: When the two hours is up, and timer has gone off, turn on your oven at 375 degrees for 15 more minutes. STILL, DO NOT OPEN THE OVEN DOOR.
Step 7: When the timer goes off, this time it means your prime rib is done! You may open the oven door, take the roast out and wrap in foil to keep it warm.
Step 8: Do all your last minute preparations, call everyone to dinner - you are ready to eat!

My roast is almost done resting (12 more minutes), close to turn on the oven time (Step 6). Salad is ready; asparagus is ready to steam and horseradish is made! I'll let you know how it turns out. This has been incredibly easy, so I hope it is good. If so, it will be a great holiday dinner away from home kind of meal! I made enough to have leftovers - prime rib tostadas!

The results: The prime rib turned out great. I choose rare for cooking time, and next time I will choose medium rare (it was quite rare). Delicious, easy and a great way to cook a prime rib.