Nissan Publication No. SME4E-0S12G0.
It is on a couple of sites but this is the only one that I will keep up to date: -
http://www.mediafire.com/?rhbdi2tp7jl7j
There are separate, searchable .pdf files for the various sections of the Manual as well as a .rar file which includes all the separate sections in a compressed file.
Have a look at the file "S12_Service_Manual_AA.PDF" first to determine what individual sections you might want.
Let me know if you have any problems or require any other parts of the Manual.
