I viewed the source code on the page and it looks like he has a simple PHP script that's running his email contact form.
Basically you would find a script (I don't think it has to be PHP) that does what you want it to do (attach files) and create an HTML feedback form on your site.
Webdev is our resident PHP guru.
Is that what's going on on this page?
jonathanleger.com/felinephotos/