oh if it comes down to it just dilute your piss. Drink a bunch before the test and then you will basically just pee water. A dilute sample isn't a pass, but it isn't a fail either. This would give you enough time to get a whizzinator or quick fix so you can pass your test.

Because your a heavy smoker you would have to really dilute your urine. drink and drink and drink, then pee a couple times, drink and drink and drink, pee, drink, pee, pee, drink and then hope for the best. good luck, tell us how it goes...