I noticed a NR to NR DSP upgrade is now available, that's awesome (and very generous of you)!

http://www.alpriorityusa.com/Net-Radar-DSP-Upgrade.html

I have one NR-O and one NR-DSP head, but would love to have NR-DSP both Front and Rear. How do I go about sending in the NR-O head? Where do I ship it and what paperwork do I need to include?

Thanks in advance!