Fighting for Your Overtime?

Papa Legba asks: "I am in a battle, with a now ex-employer, over the unpaid overtime that I incurred while working in their IT department. I refused to accept the answer 'you are a computer guy, you don't get overtime' and did some looking. My research has turned up these relevant documents: the definition of exempt Computer professional at section 13(a)(17) of the FLSA managed by the Department of Labor, the amendments in the ESA labeled C.F.R.541.3(a)(4) and C.F.R.541.303 , and a site referring to a letter, which I cannot find a copy of. The letter describes a Dept. of Labor ruling from December 4, 1998 that set out who qualifies as a computer professional. Can anyone find this letter, and is there any more documents that I am missing. I have a lawyer but this is a very specific area and I want to do this right. Has anyone else fought this battle?"