I have a copper NAM 2.0 that I took on trade that I would like to upgrade. I have a NAM 4.1 upgrade disk that I have used a few times to upgrade from 4.0 to 4.1 and it has worked flawlessly. I'm guessing that a s/w jump from 2.0 to 4.1 will have more involved than simply sticking a disk in the drive and waiting for happy beeps. Any one familiar with this s/w upgrade?