[Eikinskjaldi]

Forum display is handled by the forum cache, so even if you do create a forum manually it wont show up on your board.

You need to use the datamanger from includes/class_dm.php

here is a partial example from my site. Note my board is heavily modded, some of these option may not apply to vanilla vb.

PHP Code:

function forge_forum($parent, $title) {
        global $vbulletin;

        $forum = array(
                'title' => trim($title),
                'description' => '',
                'link' => '',
                'displayorder' => $disp,
                'daysprune' => -1,
                'parentid' => $parent,
                'newthreademail' => '',
                'newpostemail' => '',
                'options' => array(
                        'moderatenewpost' => 0,
                        'moderatenewthread' => 0,
                        'moderateattach' => 0,
                        'warnall' => 0,
                        'styleoverride' => 0,
                        'canhavepassword' => 1,
                        'cancontainthreads' => 1,
                        'active' => 1,
                        'allowposting' => $open,
                        'indexposts' => 1,
                        'allowhtml' => 0,
                        'allowbbcode' => 1,
                        'allowimages' => 1,
                        'allowsmilies' => 1,
                        'allowicons' => 0,
                        'allowratings' => 0,
                        'countposts' => 1,
                        'showonforumjump' => 0),
                'styleid' => -1,
                'password' => '',
        );

        $forumdata =& datamanager_init('Forum', $vbulletin, ERRTYPE_STANDARD);

        foreach ($forum AS $varname => $value) {
                if ($varname == 'options') {
                        foreach ($value AS $key => $val) {
                                $forumdata->set_bitfield('options', $key, $val);
                        }
                }
                else {
                        $forumdata->set($varname, $value);
                }
        }
        $forumsave = $forumdata->save();
}