Inputing code

Hi there,
I want to input some code into the contact form on my homepage so that it automatically signs people up for my aweber newsletter. But I can’t find a way to even look at it the text, much less edit it, so I’m wondering if you could input it for me?

<form method=”post” action=”http://www.aweber.com/scripts/addlead.pl “>
<input type=”hidden” name=”listname” value=”awlist3544186″ />
<input type=”hidden” name=”redirect” value=”” />
<input type=”hidden” name=”meta_adtracking” value=”custom form” />
<input type=”hidden” name=”meta_message” value=”1″ />
<input type=”hidden” name=”meta_required” value=”name,email” />
<input type=”hidden” name=”meta_forward_vars” value=”1″ />
<input type=”text” name=”name” value=”” /> Name
<input type=”text” name=”email” value=”” /> Email
<input type=”text” name=”custom Color” value=”” /> Custom Field
<input type=”submit” name=”submit” value=”Subscribe” />
</form>