[kh99]

OK, I don't understand what will be in link1.php, link2.php, link3.php - are those vb pages?

In any case, to show your sub menu only on your static page you could try this in your plugin code:

if ($vbulletin->nodeid == 124)
{
// add sub menu
}

BTW, you are right about "static html" not being an html file. Its called that to distinguish from html that's put together "on the fly" by a php script when it runs. In the case of a static html page the content you enter never changes, it's just saved in the database and output as is.