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.