Hi Cheryl,
I'm sure there are many here more expert than I, but I got my evaluation process going by sending a certified letter to the SD person in charge of my son's age group. This was preschool, in his case--I got her name by calling the SD and asking, though I think I could have sent it to "Special Education, Town School District" with the same result. Then she sent me back a letter, a copy of the procedural safeguards (in retrospect, hah!), and an offer of a meeting to discuss. I think I included a few other things like the preschool expulsion letter and some letters from other caregivers outlining his problems. They did their own evaluation. I'd say send the neuropsychologist evaluation just to speed the process (from your sig it sounds like services are a no-brainer, but then I'm not a SD).
Others know more than me--I'm new at all this, but that's what we did. Wrightslaw is a good source for procedure. I think they have sample letters, but I got my sample letter from the Concord SPED PAC website, which, being in my state, was extra-helpful. http://www.concordspedpac.org/RequestEval.htm
Star