Hi,
Instead of the following fragment:
if (function_exists('taxonomy_node_form')) {
$output .= implode('', taxonomy_node_form('node_example', $node));
}
there should be
if (function_exists('taxonomy_node_form')) {
$output .= implode('', taxonomy_node_form('whatsrelated', $node));
}
thus allowing the whatsrelated entries to be catogorized.