I have a NetBoot image which I use for booting into to do things like disk maintenance and testing new applications without having to install them on my workstation. It's really handy, but I created it a while ago and much of the software on it is now out of date, like the OS, QuickTime, and Safari. I want to update the NetBoot image but the only way I think to do that is to use
Disk Utility.app to restore it to a USB drive, boot from the drive directly, make any changes necessary and re-image the USB drive, overwriting the original image.
Is that the best series of steps or is there an easier way to update a NetBoot DMG file?