Dan has it about right. Larry's advice is good; Join your local EAA Chapter. There are guys there that have been through the licensing, some multiple times. I've been working with Amateur Built Planes since the old days when GADO had to do phase insspections and sign all the annuals.
I did a talk about licensing your amateur built plane last year for our EAA Chapter and posted my outline including links to examples of all the paperwork on our web site. <http://eaa691.org/Licensing%20your%20plane.html>. Additionally, I went through licensing my Amateur Built SuperCub and walked my hangarmate through licensing his Sonex this summer, so feel free to email me directly and I'll try to answer any specific questions. If I look hard enough, I might be able to find an email from this summer with the complete packet of my paperwork including the program letter that I sent to the DAR when I requested the inspection. Jeff Scott A&P EAA 691 Chapter Prez KR - N1213W SuperCub - N143W