It's actually really simple, take as much of the vaped weed as you can and soak it in the rubbing alcohol, the higher percentage the better. Let it soak for at least 24 hours, shake it around a few times, the longer you let it soak the better. After that all you really need to do is strain it all, I use coffee filters but you can use something else, all this does is seperate the alcohol from the mass of vaped weed. I like to pour the alcohol over the mass of vaped weed and through the coffee strainer half a dozen times or so, squeeze it each time you strain it through to make sure you get the most out of it. You will probably end up going through a few coffee filters in the process.
Now my personal preference is to take a couple pinches of the vaped mass there and add it back to the alcohol, just to give it all a little more mass at the end, but it dependson how you are going to use it.
Find some sort of container that is as flat as possible and can take heat, corning ware works fine. I have a bowl with a fairly flat bottom I use, but like a cassarole pan would work well too. I take a plate and cover the top and then throw it in the microwave for like a minute at a time to force it to evaporate, but be very careful when the alcohol is running low because you don't want to burn it. You can also double boil it, which is just start a pot of boiling water and sit the bowl down into it being careful that the water doesn't splash inside. You could probably use the oven too, never tried that.
At that point you just take a razor blade and scrape all the gooey crap off the bottom and off what ever you used to cover the top too. This takes a while and the flatter the surface the easier it is. I am sure there is probably a better method of evaporating the alcohol that makes it easier to get all the stuff after but I haven't thought of it yet.
Once you scrape all the gooey "hash" stuff off the bottom, smoke and enjoy. I am not sure if there is a technical deffinition of hash that this doesn't live up to, I just call it that because that's what I've always seen it referred to.