While you can remove the version checking feature from vBulletin, downloading the software from any site other than
www.vBulletin.com is piracy and can cause legal problems for you down the road. Pre-modded versions of the software are large security risks and as a vBulletin owner, you should make all modifications yourself or have someone you trust do so. The security risk to your site and your member's information is very high right now. Since Identity Theft is the fastest growing crime and can have financial impacts on an individual for years, this is not something you should encourage by using insecure software sources.