[komirad]

To block images (I also changed the post needed to 3):

Line 18

if (($vbulletin->userinfo[posts] < 3) and (stristr($pagetext,'[url') or stristr($pagetext,'[URL') or stristr($pagetext,'[img') or stristr($pagetext,'[IMG') or stristr($pagetext,'www.') or stristr($pagetext,'http://')))

Line 29:

if (($vbulletin->userinfo[posts] < 3) and (stristr($pagetext,'[url') or stristr($pagetext,'[URL') or stristr($pagetext,'[img') or stristr($pagetext,'[IMG') or stristr($pagetext,'www.') or stristr($pagetext,'@') or stristr($pagetext,'[at]') or stristr($pagetext,'http://')))

and Line 40, change the error message:

<phrase name="error_nourlallowed"><![CDATA[You are only allowed to post URLs or images you have made 3 posts or more.]]></phrase>