I believe the discs are the same for all the systems that you would use D3, N3, N4, Z1, Z2, etc...
Anyways, heres my story. It worked like a Charm..
-Downloaded from the torrent link
-Unrared the files from the .rar file
-opened up in Alcohol 120
-checked the book typing to make it DVD Rom
-insert DVD Dual Layer +R/RW disc, (I used a hp dual layer disc. $9.89 for a 3 pack from wal-mart)
-Started image burning wizard
-selected .mds file to burn from the .rar file
-set settings to lowest burn speed
-burned
-insert into avic n3
-upgrade
-upgraded maps. finished