I am making the edits now. Here are the old htaccess files

Code:
Options All -Indexes
Options +FollowSymLinks

ErrorDocument 404 http://www.pentaxforums.com/404.php

RewriteEngine on
RewriteCond %{HTTP_HOST} !^www\.pentaxforums\.com
RewriteRule (.*) http://www.pentaxforums.com/$1 [R=301,L]

RewriteCond %{SCRIPT_FILENAME} !-d
RewriteCond %{Script_FILENAME} !-f
RewriteRule ^(.*)$ index.php?a=$1 [QSA]
Code:
RewriteEngine On

RewriteCond %{HTTP_HOST} !^www\.pentaxforums\.com
RewriteRule (.*) http://www.pentaxforums.com/gallery/$1 [L,R=301]

RewriteCond %{QUERY_STRING} !vbseourl=
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /forums/vbseo.php?vbseourl=$1&vbseorelpath=../gallery/&%{QUERY_STRING} [L]

RewriteCond %{QUERY_STRING} !vbet_outside=true
RewriteRule ^(.*)$ $1?vbet_outside=true [L,QSA]