I can't setup VBSEo , and what is this ? Is this what VBseo does ?

[desiboy]

tedit .htaccess

# Comment the following line (add '#' at the beginning) 
# to disable mod_rewrite functions. 
# Please note: you still need to disable the hack in 
# the vBSEO control panel to stop url rewrites. 
RewriteEngine On 
 
# Some servers require the Rewritebase directive to be 
# enabled (remove '#' at the beginning to activate) 
# Please note: when enabled, you must include the path 
# to your root vB folder (i.e. RewriteBase /forums/) 
#RewriteBase / 
 
#RewriteCond %{HTTP_HOST} !^www\.yourdomain\.com 
#RewriteRule (.*) http://www.yourdomain.com/forums/$1 [L,R=301] 
 
RewriteRule ^((urllist|sitemap_).*\.(xml|txt)(\.gz)?)$ vbseo_sitemap/vbseo_getsitemap.php?sitemap=$1 [L] 
 
RewriteCond %{REQUEST_URI} !(admincp/|modcp/|cron|vbseo_sitemap) 
RewriteRule ^((archive/)?(.*\.php(/.*)?))$ vbseo.php [L,QSA] 
 
RewriteCond %{REQUEST_FILENAME} !-f 
RewriteCond %{REQUEST_FILENAME} !-d 
RewriteCond %{REQUEST_FILENAME} !^(admincp|modcp|clientscript|cpstyles|images)/ 
RewriteRule ^(.+)$ vbseo.php [L,QSA]