I couldn't get the patch to work, so I tried a different method that seems to be working fine.
I substituted the aWeber Java snippet I designed and copied on the aWeber site for one of my "More Information" pages (page_3 in my case). I initially tried to just replace the text in the english.php but it was still a link.
So instead, I went to /includes/modules/sideboxes/more_information.php
Here, I changed replaced the link text with the aWeber Java snippet so the line:
if (DEFINE_PAGE_3_STATUS <= 1) {
$more_information[] = '<a href="' . zen_href_link(FILENAME_PAGE_3) . '">' . BOX_INFORMATION_PAGE_3 . '</a>';
became:
if (DEFINE_PAGE_3_STATUS <= 1) {
$more_information[] = '<script type="text/javascript" src="http://forms.aweber.com/form/12/xxxxxxxxxxx.js"></script>';
}
I then added text before the aWeber info:
if (DEFINE_PAGE_3_STATUS <= 1) {
$more_information[] = '<br><br><strong>INSTANT DISCOUNT AND FREE GIFT!<br>Join our <i>free</i> VIP List for discounts and news! We'll send you a FREE PDF book and discount coupon just for signing up! Simply fill in your email and name, then click "Submit."</strong><script type="text/javascript" src="http://forms.aweber.com/form/12/xxxxxxxxxx.js"></script>';
}
I am still designing my site, so it's not yet online, but it's working fine in my tests.