.htaccess

<ifModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
</ifModule>

ErrorDocument 404 /404.php

RewriteEngine on
RewriteRule ^index$ ./index.php
RewriteRule ^register$ ./register.php
RewriteRule ^helpus$ ./helpus.php
RewriteRule ^forgotpass$ ./forgotpass.php
RewriteRule ^me$ ./me.php
RewriteRule ^logout$ ./logout.php
RewriteRule ^invite$ ./invite.php
RewriteRule ^myacc$ ./my_account.php
RewriteRule ^htmltags$ ./htmltags.php

RewriteRule ^pms$ ./privatemessage.php
RewriteRule ^pmnew$ ./privatemessage_new.php
RewriteRule ^pmsent$ ./privatemessage_sent.php
RewriteRule ^pm/(..*)$ ./privatemessage_read.php?pmid=$1
RewriteRule ^pms/(..*)$ ./privatemessage.php?pmid=$1
RewriteRule ^pmnew/(..*)$ ./privatemessage_new.php?receiver=$1

RewriteRule ^usersearch$ ./user_search.php
RewriteRule ^user-(..*)$ ./user_profile.php?uname=$1

RewriteRule ^category/(..*)$ ./forum_category.php?catid=$1
RewriteRule ^topic/(..*)/(..*)$ ./forum_topic.php?catid=$1&topid=$2
RewriteRule ^post/(..*)$ ./forum_post.php?postid=$1

RewriteRule ^mailconfirm/(..*)$ ./confirm_email.php?key=$1