zcm 11.3 on sles 11.2

We are migrating our desktop environment. We have hudreds of bundles assigned to the Workstation group and I need to assign all of them to a new group instead. Does anyone have experience scripting this kind of change? It looks like zman has some options, but how do you get a list of all bundles in all folders?
Support says scripting is not supporting but manually changing each bundle is would take too long.