We are using NetInstall to image Macs at work. I build the NetInstall images with System Image Utility, and customize them with the "Add Packages and Post-Install Scripts" workflow item. NetInstall itself works great but I've noticed that several third-party install packages cause the imaging process to fail. A good example is Symantec Endpoint Protection.
My workaround has been to use JAMF Composer to snapshot an installation on a test machine to use that to create a new installer package. This works 99% of the time. However, I was wondering... What is it specifically about certain installation packages (.pkg files) that causes them to fail during the NetInstall process?