Click the "Download PowerPoint" button and click save. On the next menu that pops up, click "Desktop" on the right-hand side of the menu and then click "save" at the bottom right. The click close on the next menu. The PowerPoint framework will be on your desktop so you can find it easily.
To import the PowerPoint framework into your presentation, open the downloaded file and do one of two things: either 1) select the whole page in slide sorter mode and copy and paste it into your presentation (also in slide sorter mode) or 2) in page view mode, select just the framework and copy and paste it onto a page in your presentation.