In the sidebar of this page you will find a Downloads division, and under that a Template link, by which you can download the current zTemplate folder in Stuffit format.
Purpose and locations of the ArchiCAD and PlotMaker preferences, and why you care.
There is an issue in AC8 v3 where certain details can not be deleted or renamed. Graphisoft Tech Support has provided a solution.
I have fixed the templates, so this shouldn't be a problem for new projects, but I'm sure there are some running projects that need to be fixed.