I don't have vbseo so I can't inform you much about that.
You will want to use vbseo's friendly url rewriting code in the htaccess instead of the one posted here though. So in your case, copy the contents of the htaccess file into the htaccess that vbseo creates. Remove the following code from it and save. I don't believe vb supercharged plays well with vbseo but I'm not sure.
Code:
#Author: Extreme Gaming
#Friendly Urls By: Matty Asia
# Version 1.8
# Usable from vbulletin 4.0.0 - 4.1.4
# Special Thanks Goes to W3Total Cache for much of the htaccess rules
# Downloaded from: https://vborg.vbsupport.ru/showthread.php?t=267588
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} "Mozilla/4\.76 \[en\] \(Windows NT 5\.0; U\)"
RewriteRule .* - [F,L]
Options +FollowSymLinks
### THIS IS A LITTLE EXTRA SECURITY AND CAN BE REMOVED
#RewriteRule ^includes/(.*) index.php
#RewriteRule ^vb/(.*) index.php
#RewriteRule ^packages/(.*) index.php
### THIS IS THE ACTUAL REWRITE
RewriteRule ^threads/([0-9]+)(?:/?$|(?:-[^/]+))(?:/?$|(?:/page([0-9]+)?)) showthread.php?t=$1&page=$2&%{QUERY_STRING}
RewriteRule ^members/([0-9]+) member.php?u=$1&%{QUERY_STRING}
RewriteRule ^forums/([0-9]+)(?:/?$|(?:-[^/]+))(?:/?$|(?:/page([0-9]+)?)) forumdisplay.php?f=$1&page=$2&%{QUERY_STRING}
RewriteRule ^blogs/([0-9]+)(?:/?$|(?:-[^/]+))(?:/?$|(?:/page([0-9]+)?)) blog.php?u=$1&page=$2&%{QUERY_STRING}
RewriteRule ^entries/([0-9]+)(?:/?$|(?:-[^/]+))(?:/?$|(?:/page([0-9]+)?)) entry.php?b=$1&page=$2&%{QUERY_STRING}
RewriteRule ^list/([^/]*/)([0-9]+) list.php?r=$1$2&%{QUERY_STRING}
RewriteRule ^content/(.*) content.php?r=$1&%{QUERY_STRING}
RewriteRule ^widget/config/([0-9]+) widget.php?r=config/$1&%{QUERY_STRING}
RewriteRule ^((urllist|sitemap).*\.(xml|txt)(\.gz)?)$ vbseo_sitemap/vbseo_getsitemap.php?sitemap=$1 [L]
RewriteCond %{REQUEST_FILENAME} -s [OR]
RewriteCond %{REQUEST_FILENAME} -l [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^.*$ - [NC,L]
RewriteRule ^$ $1.php?r=$2 [QSA]
## Rewrites
RewriteEngine on
Options +FollowSymlinks
RewriteCond %{REQUEST_FILENAME} -s [OR]
RewriteCond %{REQUEST_FILENAME} -l [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^.*$ - [NC,L]
# Forum
RewriteRule ^threads/.* showthread.php [QSA]
RewriteRule ^forums/.* forumdisplay.php [QSA]
RewriteRule ^members/.* member.php [QSA]
RewriteRule ^blogs/.* blog.php [QSA]
ReWriteRule ^entries/.* entry.php [QSA]
RewriteCond %{REQUEST_FILENAME} -s [OR]
RewriteCond %{REQUEST_FILENAME} -l [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^.*$ - [NC,L]