Well, hash is just the trichomes, which is THC and the other cannabinoids. The same amount of hash compared to the amount of bud will get you FUCKED.

You only get 10-15% of the wieght of your weed, cos otherwise its not pure, and then its a waste of time.

The easiest way to make it is this:

http://weedfarmer.com/hash/making_hash.html

And its got a GREAT soundtrack lol!