The easiest way is the iframe input. Just put the iframe with link to the Script into Website. or do only a link to it.
iframe:
Code:
<iframe src="http://yourwebsite.com/char_res.php" width="XXXpx" height="XXXpx" frameborder=0></iframe>
Note* Change with an height to your favors
Link:
Code:
<a href="http://yourwebsite.com/char_res.php">Char Res</a>