Thanks for the additional info. It sounds like he doesn't have an adequate environment and that's probably why he's stressed and aggressive. Take a look at the caresheet on this forum for all the specifics.

Basically, they need a temperature gradient from the low 80s to the low 90s, identical hides on each side, fresh water, and an appropriate sized meal once a week. They don't need high humidity, although it's good to bump it up to around 60-70 percent when they are shedding. The hides should be small enough so that he can feel the sides touching him. You can make a good, cheap hide from the plastic drip trays that they use under plant pots. Just cut a hole in the top or on the side. The lamps are okay, but they tend to dry out the air a little too much. You'd probably be better off getting rid of the humidifier and lamps, and getting an under tank heater and a thermostat, or a rheostat (dimmer) if you can't afford a decent thermostat. I'm sure you'll find that your snake will settle down and be much more docile once his environment is to his liking.

Good luck!

edit: One more thing... a decent digital thermometer is practically essential. Take a look at the Accurite model at Walmart that has an extra temperature probe and a hygrometer to measure the humidity.