Straight from Wikipedia:
"he client is asked to disrobe. Occasionally, a paper g-string is provided to protect the client's modesty. The procedure starts with baby powder or talcum powder being spread liberally over the area to be waxed. This prevents the hot wax from sticking to the skin. Then, as in other forms of waxing, hot wax is spread over the area from which hair is to be removed. Cotton strips are placed on the waxed area and then ripped off. The waxer then works her way around the body systematically removing the hair from the genital area, buttocks, and anus. This procedure removes the wax, hair, and any dead skin cells lying on the skin surface. The person performing the wax will then finish using tweezers to remove any stray hairs that the waxing missed. Finally, the remaining pubic hair (the so-called "landing strip") is either trimmed with scissors, or waxed off if the client requests it.
The wax used is often a mixture of natural beeswax and tall oil rather than the more common synthetic 'waxes' used for regular leg waxing. It is felt that beeswax is stronger, and more effective at removing the thicker, coarser pubic hairs.
The pain involved with this procedure can be slightly acute and can continue for quite some time (from several seconds to minutes). Most of those willing to endure the procedure feel that the result is worth the discomfort. Furthermore, most feel that the procedure becomes less painful with subsequent treatments."
My advice is to shave everyhting off that you can, then man up and get that shit done, you made a promise.