Bill, I don't have all of the answers for your stuff above because I'm just starting my first "official" batch of cuttings. Anything I'd done prior was tinkering.
UPM = Ultimate Potting Mix. It is made by Ferti-Lome, http://www.fertilome.com - it is a soil-less potting mix, with no added fertilizer, but lots of good stuff like sphagnum, vermiculite, pine bark, a "wetting agent" and other things ... you get the idea. The two big things are 1) soil-free, 2) fertilizer-free. It has nutrients that your cuttings will like, via the mixture used.
I couldn't find UPM in my area, although I have several places that are ferti-lome suppliers. You may not be able to either. So, I did some research in my area, and found that a company called Fafard carries a mix that is insanely similar in content (if not exactly the same) called Fafard 3B. It is what the Atlanta Botanical Garden uses for all of its cuttings, propogation, and even plants. More info on the product and what it contains is here: http://www.fafard.com/?p=139
I'm using Fafard on mine.
For temperatures and light, everything I have seen has said 1) Room temperature, 2) Avoid heating pads, 3) Indirect light, put in a sunny room or on shady side of a house, 4) Keep going till you see good roots that are well developed.