I am familiar with several such cases. See, for example, Dimas' post, Taking One for the Team Part Two. (For relevant background, see his earlier post, Taking one for the team.)

As you read about the various experiences posted here, bear in mind that the great majority of those who have downloaded The Lie Behind the Lie Detector (100,000+ downloads) have not posted on this message board.

Bushido71,  I don't know if this will work for you, but it did work for my husband. His ethics wouldn't allow him to use countermeasures (everyone, please don't flame me for this, it is simply his truth that he would prefer to have no career in law enforcement than have one that was launched by operating counter to the parameters set by the organization no matter how capricious those parameters.) However, I read TLBTLD and harped till he listened. He finally learned just a bit and devised a way to pass on his terms by being compliant with what the organization expected of a subject. He figured that if they expect people to lie on the control questions, then he could comply with that. What this looked like: in his test, he identified control quesitons, and as he was answering them, he really let himself get in touch with the doubt that he was telling the truth or that he actually was remembering every incident. This doubt bothered him (as he is an EXTREMELY honest guy), and it therefore spiked the control questions.  I am not sure, but I think he figured out a way for the super-honest types (usually made into collateral damage by false-positives), to throw a good reading. Or, perhaps this would only work for him. I do know he didn't use countermeasures though, because he wouldn't even let me talk to him about them. 

Finally, if you don't read TLBTLD, then please be sure to go in to your test with a great attitude, be friendly, look the examiner in the eye and understand you are being tested from the minute you park your car till you leave the parking lot. Don't be in a hurry to leave, and know that, no matter how much the arm cuff hurts you should not mention it or you'll be seen as attempting to get the examiner to loosen it, thereby affecting the results. 

Best of luck.