It's now been a decade since I've supported Zenworks in a commercial environment... it really was a gret product. There was no PowerShell and every engineer used a bag full of DOS type utilities to overcome limitations with supporting machines.
It was a real surprise to hear of a colleague needing to convert Zenworks SnapApps for a modern rollout. Installshield (if you have a license) can / could convert Netware AXT files but the quality of the MSI produced was poor. It was far cleaner to create a standalone installer that could be recaptured independently on a clean system.