You can use the Template Organizer's Style Templates tab to manage your style templates.
To see the organizer:
The list shows all the available collections and the style templates they contain. You can add or remove entire collections from the Organizer using the Package folders option. To further organize your styles, you may create folders within the collections.
To create a new folder:
Select the collection where you want to add the folder.
Under Folder commands click the New button.
Enter the name for the new folder.
Note: The Folder commands Delete and Rename buttons in this group apply to entire folders. If you delete a folder, all the templates it contains will also be deleted.
Move styles by dragging to a new folder or collection.
To modify, duplicate, delete or rename a style, select it in the list and then use the Template commands buttons.