It is very easy to link your photos on Flicker.com to templates on Zetaprints.

This screenshot has button linked to a template. Click on the image to see it in action.

How to link Flickr to Zetaprints

Flickr allows you to post a comment to an image, including some HTML.

Find a template you want to use with the photo

Click on Share with others

Grab generated HTML from Template sharing page

Paste the HTML into the comments text box and save