http://www.hulla-balloo.com/hack/level5/level5.php?to="email@address"
or is it
http://www.hulla-balloo.com/hack/level5/index.php?to="email@address"

It's simple php, website.php?variable="blah"
Refer to er0k's tutorial to learn basic php
http://www.antionline.com/showthread...439#post640439