You could find step by step directions on how to deep fry a turkey if you go to food.com. Personally, I've never tried it. To much prep time for me. You also have to buy a lot peanut oil, propane tank, deep fryer, etc. Also, you gotta be VERY careful where you fry the turkey. You don't want to burn down your garage or house. It's just a lot easier for me to pop it in the oven for 3 1/2 - 4 hours. Good luck and bon appetit'.
To deep fry a turkey, you need to season the turkey by sprinkling cayenne pepper over it. Then, thaw the turkey completely while the oil is heating to the desired temperature. Marinade the turkey after you have prepared the metal handle. Place the turkey in a clean roasting pan and deep fry for about 30 minutes. Find detailed instructions from http://www.eatturkey.com/consumer/cookinfo/fryturk.html.
When you start to heat the oil make sure that it won't overflow the pot or you'll have a nasty fire when you drop the bird in . It only takes about 20 min to cook and it comes out really nice and juicy. They also make outside propane burners for this . I could be wrong but i think that is the only or best way to cook it out side.