I've made some using the ISO method, so I'll share my experience, might clear up some things for people. In my case, I was desperate for a high (sad, I know) and all of a sudden it occurred to me that I had some 99% alcohol and that my grinder (electric coffee grinder which I use to break up my buds, 5 bucks from Walmart), which was pretty much clear of easily scrapeable stuff, still had plenty of residue from the many ounces that had passed through it. The lid had plenty of nice yellow residue as well (the yellow dust is great stuff). So, I swished a bit of alcohol around the grinder, around the lid and then poured it onto a ceramic dinner plate. To dry it faster, I put it in front of my bedroom fan and within an hour it was all dried up. The result was sticky black/green stuff and some yellow dust. I find the green/black gives you the "low notes" ie body stone and the yellow gives you the "high notes" ie head high. I guess the green/black you could call "hash" and the yellow "kief". Basically it's the essences from the magical herb we all love that get you stoned/high.
Making hash is really simple. The key fact to know is that the essences dissolve easily in alcohol, so putting any sort of MJ material in alcohol will quickly strip the green/yellow goodness out of it. After that it's just a matter of letting the alcohol evaporate, which it will do fairly quickly and then result is ready to go. Scrape it up and smoke with caution, because it will be STRONG. The green/black will make your body buzz and possibly give you couch-lock, and the yellow will make you feel really nice and happy, with less body sluggishness. Smoked together you will go for a nice trip into happyland.
Billcollector99: I'm not sure what you did, but like I say above, it is pretty hard to go wrong with making hash. I hope you didn't try heating the mixture to speed up drying...I'm not sure that would be a good idea. I'm still unclear on the whole "what heat does to THC" thing, some things I've read say they make it stronger, some weaker. Probably a case by case thing.
There are many methods to make hash and similar products, but the ISO one is the easiest and simplest I would say, though perhaps the most crude. Since I've never had "bubble hash" or anything like that, I can't say what I'm missing. It certainly is a nice simple way to make use of the "leftovers" once you've harvested your buds. Or so I read, I'm looking forward to trying it once I harvest my first crop. The hash result should tide me over until my buds finish curing.