I didn't bother to read the rest because it's way too long, but I'll contribute to the thread. Sorry if this has already been posted. I don't know if this stuff has already been recommended or if you've already chosen something, but who cares.
I'm an occasional smoker.. I don't smoke during school semesters, and I don't smoke when I'm looking for a job. I have broken this once though..
First of all.. from what I've heard, unless you're taking a piss test, you're

ed. I didn't read what kind of job you're applying for, but if it's a simple job like retail or fastfood or something, you'll probably be doing a piss test.
SO.. if you are taking a piss test, you can buy niacin. Don't know how much it costs because I've never had to use it, although it was always free for me to use (except the one time I needed to pass a test). You can find it at drug stores or wherever, I'm sure someone else was specific about it.
There's also a drink you can buy, but usually costs a good amount, at least $20, as much as $50. Should clear your system in a day. I'm always broke and never down to buy shit like that unless my life depended on it, so I didn't do this.
The method I did, since I had no other option because my piss test was the next day. I had smoked a few times in that past month.. My girlfriends brother calls up some guy who smokes excessively and passes piss tests doing this. He says that it involves clorox bleach. I kind of cringe, but I really don't give a

and I always take risks, so I do it. I did a little research about it online before I did it, and people have claimed that clorox can clean your system.
Tells me to take the cap off the clorox, pour clorox into the cap. Take the ends of a Q-tip and cut off those ends. These two ends should be dropped into the cap. Let the q-tip ends sit a while, and then you have to drink 8 glasses of water, 4 per q-tip end. These should be big glasses of water, like the small water bottles that people carry around, about 8oz.
So just sip a little water as if you're sipping before you down a shot of alcohol or as if you're taking medicine pills, then take the tip of the q-tip in your fingers and toss that shit into your mouth. Then just start drinking 4 glasses of water or more so that it goes down to your stomach and you don't poison yourself.
Wait a few hours, and repeat with the second q-tip end. Take the q-tip end and start drinking another 4 hours.
Might sound crazy, but if you've got balls, then you have a good chance. You have a better chance of cheating piss tests if you haven't smoked a large amount prior to the test. My friend tried this and it didn't work, but I should have been there to help him out through it, since he might have

ed up when he did it.. so it's at your own risk. Good luck.