basic set up, wrist cuffs, suspension point, spreader bar 4 feet long, with strong eyelets at each end plus one in the middle, a length of rope, approx 15 feet long, two short ropes about 3 feet long, two snap links and an ice-release. You might add a gag (I used a bit-gag for safety) and clover clamps.
First dress as you wish, in my case a tightlaced corset, stockings and a thong, plus 4" heeled boots. The boots are an essential part. Then put on the cuffs, and set up the ice release. I've described this elsewhere, but it is the nylon mesh bag used with some washing soap tablets, containing a block or more of ice, threaded through a narrow ring (I used the end of a small dog chain)then wound onto a metal ring, I have some from a horse tackshop, about 2" diameter, 1/4" thick round metal.
Then bind your ankles with the two short ropes, including a snap-link in each binding (these will clip onto the outer ends of the spreader bar) Stand under the suspension point, mine is a strong eyelet screwed into the ceiling (nominally used to hang my archery bow
) with your legs clipped onto the bar, and see how high you can reach. Then set the ice-release ring so the cuffs can be locked on, using a short chain from the suspension point. You are NOT going to be suspended, just it would spoil things if everything collapsed on you 
Once you have the height set, get the long rope and make a tight loop or two round your waist, knotted at the front, then drawing the two tails of the rope through your crotch and back through the rope behind you, then down, making a crotch loop that will pull tight if you pull the free ends. Guess where they are going...yes, through the middle eyelet on the spreader bar.
Now release your feet and get the rest of the scenario sorted, because you wont do it later!
Put on the gag, fit the clover clamps, you could add some clothes pegs to sensitive skin, if you wish a plug, vibrator etc.
And finally. Put a suitable padlock ready on the ice release. Clip your feet to the bar having threaded one tail of the crotch rope through the eyelet and tighten the rope so you can't quite stand with legs straight, then knot it. Finally reach up and lock your wrists to the ice-release ring.
If you have done this right, you will have to stand with bent legs and support your weight, twist at the hip and rest your weight on one leg and the cuffs, or hang from the cuffs and relieve the strain on both your legs. The high heels make it almost impossible to bear the weight squarely on both feet as your feet are spread a long way apart.
I used a single fridge tray ice-cube, and even with being able to hold it, speeding the melt, it took about ten minutes to melt. Maybe I'm a pussy but that was long enough. Two hours later and my legs are still wobbly!
