Attached to this page are images that are commonly used in the Demonstration Sapce.
You can insert the images directly into a page — there's no need to attach them to the page itself. Here's an example of how to do that:
[!_Images^DownloadButtonSmall.jpg!|http://www.atlassian.com/software/confluence/ConfluenceDownloadCenter.jspaa]
Or:
!_Images^1.png!