i know in order to update your dvd navi you will need a software upgrade disc and the new navi dvd fron zenrin. my buddy gave me his original from his 05 because he replaced his navi with the pioneer touchscreen, but it doesn't work in my 03 because i don't have the software upgrade disc. has anyone been able to do this for the new 06 or 07 discs for us older model 03-05. i've got an 03 and been driving around blind in my area. if anyone has some backups for the 06 or 07's they would like to share many thanks.