How to d/l these themes ?- “eris design”

You don’t download them. Note the phrase at the top of the page, “Eris’ Template Generator.”

Select the design you want and then fill all the correct data into the boxes below including the selection for WordPress. After you’re done entering data at the bottom you will see “Just click this button to get your personalized layout:”

It will then generate the theme files that you copy into your theme folder.

You will also have to copy any image files that may be needed for the style you select.