Just to make this clear, as there seems to be a lack of clarity in this thread:

Office 97 - 2003
Has Autotext only

Office 2007 -
Has Building Blocks/Quick Parts, which includes Autotext.
Building Blocks can be organised into galleries (use the Custom galleries to ensure that the building blocks don't appear in the galleries in the ribbon), and assigned categories (start the category name with a space or underscore to make it appear at the top of the list)