[Opserty]

1. Not sure, personally I have never used it.
2. Add a vBulletin option setting then use PHP like:

PHP Code:

if(!$vbulletin->option['pageenable'] AND is_member_of($vbulletin->userinfo, 6))
{
    // Bla bla
} 


3. You should be using the vBulletin input cleaner, use the TYPE_NOHTML type to automatically use htmlspecialchars() there is an article about it in Articles section. Then use $db->escape_string(); on them there is an article about it in the Articles section, check it out.

4. There isn't much, some people prefer to enclose column/table names in backticks. Sometimes useful if you use a reserved MySQL word for a name (though you shouldn't really do this).

5. Just remove it from the $vbulletin->url variable...

PHP Code:

$vbulletin->url = "page.php?" . $vbulletin->session->vars['sessionurl']; 


6. So people can create their own translations, for what you have written, if they need to. (This way they can run more then 1 language on the same board).

7. When converting from TIMESTAMP to a "text date" e.g. "3rd Aug", the vbdate() function should automatically factor in timezones.