Source

Q. Where do I put the PowerPoint Template Files?
A. In your download there are Powerpoint Template Files (.pot). To install them, simply move those folders to: C:\Program Files\Microsoft Office\Templates\ .pot files

Q. How do I apply a template to my existing presentation?
A. 1. Open your presentation.
2. Select "Apply Design Template" from the "Format" menu.
3. Select the template you want and click "Apply"

Q. How do I apply a template to a new presentation?
A. 1. Select "New" from the "File" menu.
2. Select "Apply Design Template" from the "Format" menu.
3. Select the template you want and click "Apply"

Q. What's the difference between templates and backgrounds?
A. Templates are "pre-made" presentation shells. When you apply a template to your presentation, the Title Master and Slide Master (text slide or secondary slide) are already available for you to insert text. The typeface and font color and size are already set.

Backgrounds are just the .jpg images that are seperate from templates. Users who want to use just the backgrounds should feel comfortable formatting and designing their presentations from scratch, including:
• Creating title and slide master pages
• Choosing proper placement and size of text
• Selecting the proper typefaces and styles for Headings, Subheads, and Body copy
• Creating their own custom color palettes, custom bullets, etc.

Get PowerPoint Templates Here!