Hey growley,
I´ll try to answer your questions to the best of my ability.
Bib pretty much recommends the type of wrap illustrated here Wrapping drawings
But that´s just a suggestion, and a good one. Then personal preference comes into play, some wrap over their head and some leave it exposed, one uncut guy here even "cushions" his head with a strip of cloth under the foreskin, yet others experiment with leaving more or less blood in the head to give it more stability. Watch the preassure here.
Pulling the excess skin towards the head leaves less skin to slide down, yes. But it also means that the skin left will be tighter from start and take a lot more of the weight, thus stretching mainly skin. Apperently there should be a way that leaves the shaft and ligs to take most of the weight instead of the skin. The right kind of wrapping and a tight hanger should do that, and start with low weights.
A tip here, do some AI-stretches while doing a reverese kegel, feel the pull in the ligs. Now you know how you´re supposed to feel, and roughly where. That might help when you hang. Don´t go weightcrazy, chances are that you´re not hanging right instead of with too little weight.
Yes, there are uncut hangers with good results, I think phat9 is one of them, correct me if I´m wrong. There are others as well. Do a search on uncut and hanging, nobody can spell that uncirc-thing anyway ;)
I don´t think girth is an issue to uncut hangers specificly but in general you will probably have to wrap more if you have less girth, cut or uncut. But first try to tweak the settings of the hanger to fit. I think less wrapping is better, more natural and closer to the "core".
Regards,
/Rocco