How to pass a drug test.
To pass a drug test it is very important to estalish the length of time
which the metabolties will be in your body.  If you can establish this and
then cease useof the drug far enough away from your test you should pass
without the difficulties of other methods.  

The next method to use to pass a test is the use of blockers or diuretics.
These will either water your urine down or cause you to metabolize the drug
quicker.  This will allow you to stay on the drug closer to the test.

The final method is substitution.  You can either find somone else to supply
the urine for you or you can doctor your own.  To do this you must empty 
your bladder then insert a catheter and fill your bladder with clean urine,
like in the film the program.