You only want to sell the upgrade? I'm not sure about that. But the form is on the digi web site. You basically just have to have both parties sign it and fax it in to digi.
My Band: http://www.OneEyedDoll.com
My Studio: http://www.myspace.com/nebulostproductions
Synths: Jupiter 8, Arp Odyssey, Andromeda A6, Minibrute, Matrix 1000, Juno 106, Nord Lead 3.
Rack: UA Apollo, Rosetta 800, UA 1176, UA 610, RE-301, ISA828, CL 7602 x2.
System: 15" rMBP, Logic x, PT 11, ADAM S2.5A
Most beloved plug ins: Soundtoys, Lexicon PCM, NI, Diva, Goldbaby samples, Toontrack.