??? If you are licensed owner and you will need to register your licensed username at vbulletin.com after you buy then register your username at
http://www.vbulletin.com/members/vbulletin.org.php to access the hacks. If you are not licensed, there are two ways for you to do is:
Save up to buy licensed non-cracked vbulletin at vbulletin.com
or...
Try phpBB, IBF, or whatever board you like since they re *ahem* free.