[Howdy]

I have it working on 3.53. Just had to change the admincp slightly from this in the directions:

Find:
$forum['description'] = convert_to_valid_html($forum['description']);

below add:
$forum['fhbanner'] = convert_to_valid_html($forum['fhbanner']);
$forum['fhbannerlink'] = convert_to_valid_html($forum['fhbannerlink']);
$forum['fhmessage'] = convert_to_valid_html($forum['fhmessage']);

to this -->
below add (instead of above):
$forum['fhbanner'] = str_replace('&', '&', $forum['fhbanner']);
$forum['fhbannerlink'] = str_replace('&', '&', $forum['fhbannerlink']);
$forum['fhmessage'] = str_replace('&', '&', $forum['fhmessage']);