Well, I don't know how to use a roaster like that, sorry.
But if you wanna know how I manage to piss off my sister-in-law every time we have Thanksgiving here, it's because she can't stand the fact that she starts *her* turkey day at something like 6 in the morning, but when it's our turn, they arrive here by 11 am or so, I'm just putting the turkey in the oven and we manage to eat at about the same time anyway.
I more or less follow the Cook's Illustrated method.
Choose a roasting pan that is about 2-3 inches high. Put about 2 cups of water in it, then a V-rack. Put some carrots, sliced onions and whatever aromatics you want in the pan. Some people here hate celery, so I don't use it, for example.
Remove the neck, gizzards etc from the turkey. Fold the wings so they hold against the body of the bird. I cut whatever is holding the legs together and separate them. Rub the turkey with olive oil, sprinkle with salt and pepper. I put a small lemon (cut in wedges) inside the bird, some slices of onion, 2-3 garlic cloves, and a couple of tablespoons of butter.
Place the turkey upside down in the V-rack. Adjust the racks so they will be useful for the stuff you plan to put in the oven with the turkey. Preheat the oven to 400F for a 12-18 lbs bird, 425F for an 18-22 lbs bird.
Roast the turkey for about 45 min. (12-18 lbs) or 1 hour (18-22 lbs). If roasting the larger (18-22 lbs) bird, reduce the temperature to 325F. For all sizes bird, remove it from the oven and flip the turkey breast side up, put it back in the oven and roast another 50-60 minutes for a 12-15 lbs bird, about 75 min. for a 15-80 lbs bird, or 2 hours for a 18-22 lbs bird, or until the breast meat reads 165F or the thigh reads 170-175F.
There is no need to baste the turkey at all with this method and the less you open the oven the faster it will be finished.
Let it rest for about 30 minutes and carve. Make the gravy with the pan drippings as usual. I also cook the "stuffing" in a separate pan.
I tend to cook the bird until 165F at the breasts, and remove it even if the thighs are not 170-175 yet. After we carve it, I put the dark meat in the microwave and let it go for about 2-5 minutes and it finishes cooking. That peeves my sister-in-law even further.
She just can't stand it that *other* people, including her family, claims it's the juiciest tastiest turkey they ever had. I end up photocopying the article for them all, they take it home with them. But she never tries this method when it's her turn. I would like this method *even better* if it didn't piss her off so much, 'cuz I actually like her a lot.
Cheers,
-- Paulo.