Thanks, @jeffreybrown. Because I wanted to write a code that is more general than specifying the actual path, I replaced the Source with NormalTemplate.FullName; however, even in that case Word crashed repeatedly. This kept happening until I also changed ActiveDocument to ActiveDocument.FullName.
The final code then is the following:
Code:
Application.OrganizerCopy Source:=NormalTemplate.FullName, Destination:=ActiveDocument.FullName, Name:="Comment Text", Object:=wdOrganizerObjectStyles
Many thanks,
tamasig