I have one part of my map where it is a long corridor-ish area, and i want to have a switch that triggers some flamejets to kill whoever migh be in that area. Is this possible, and how can i do it?

(sorry for all of my noobish questions, im just new to the mapping world)

Learn to use the SEARCH function for these forums. Or......
GOOGLE it. Just type your question in or a variation.

http://www.lucasforums.com/showthread.php?s=&threadid=129910)
I asked this too for my map. Just make the button, the trigger_multiple in front of it, and link it to the nice flame jets. Give the jets a dmg of like 100000000000 and you're done.

Or you could make them give you health, think that would need a negative dmg

Kinda like if you give a medpack a count of -50 it will take 50 health :D