Is this possible??

If so, is it easy ?

I can't seem to find a way for the user to attach a file of theirs.?

Yeah it's possible, but not that easy compared to basic form elements. http://www.tizag.com/phpT/fileupload.php

I use CoffeeCups Flash based forms since they only take a few secs to set up if you don't mind having flash rather than php on your sites, and the software isn't that cheap. http://www.coffeecup.com/form-builder/

A PHP upload is simple. Just make sure to use the right multipart tag.

You need to attach files to what? To an email message sent with that form? Or simply put the file somewhere on the server and provide a link to it?

use phpmailer http://phpmailer.codeworxtech.com/

supports attaching files to form