[CAG CheechDogg]

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This feature requires that the "Always use Forum URL as Base Path" be set to yes.

This will override the main Forum URL setting for forum pages to allow the forum pages to be accessed from a different directory than the rest of vBulletin. This value can either be an absolute URL in which case it fully overrides the Forum URL or it can be a relative URL, in which case it is appended to Forum URL.

For example, if vBulletin is located at http://example.com/vbulletin then entering a value of "forum" will result in the forum being located at http://example.com/vbulletin/forum. A value of "http://www.example.com/forum" will result in the forum being located at http://www.example.com/forum. All vBulletin URLs must have the same host name.

In addition to setting the Forum Component URL, you will need to take the following steps in order for the forum to work in the new location.

If you are locating the forum in a directory other than a direct subdirectory of the vBulletin directory (http://example.com/vbulletin/forum in the above example), edit forum/vb_dir.php in the do_not_upload directory of your download package to set the vBulletin install directory. Instructions are given in that file.
Upload the forum files directory from the do_not_upload to the directory you want the forum to be located in. If you want the forum to be in http://example.com/vbulletin/myforum, create a subdirectory in your vBulletin directory called myforum and upload the forum files there.
If you are using rewrite friendly URLs, you will need to copy the .htaccess file from do_not_upload/rewrite/apache2/forum to the stub directory before uploading.
If you are using a different domain, such as forum.example.com versus www.example.com then you will need a crossdomain.xml file for the asset manager flash upload. Create a file called "crossdomain.xml" and place it in your forum subdirectory with the following contents modified to suit your domain.
<?xml version="1.0" encoding="UTF-8"?>
<cross-domain-policy xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://www.adobe.com/xml/schemas/PolicyFile.xsd">
<allow-access-from domain="*.example.com"/>
<site-control permitted-cross-domain-policies="master-only"/>
<allow-http-request-headers-from domain="*.example.com" headers="*" secure="true"/>
</cross-domain-policy>

If the cookie path option is set for the site, it needs to be general enough to include all vBulletin URLs. For example, if vBulletin is located at www.host.com/mysite/vbulletin but the forum is located at www.mysite.com/mysite/forum then a cookie path of "mysite" will work, but a cookie path of "mysite/vbulletin" will not work because the cookies will not be sent to pages in the mysite/forum directory.