hello!
i have a website with multi forum http://talkorchat.com/

when new forum with login "zzz" is done it looks like this
ARMY.MILITARY.GOV :: Index

i want to make it look like a subdomain, so it would be always like this
http://zzz.talkorchat.com/

how to do that with .htaccess modrewrite?

You need to use mod_rewrite and wildcard A records in your DNS to do this.

i solved partially my problem

##################################################
<Directory "C:/aweb/freehosting">
Options Indexes Includes FollowSymLinks ExecCGI
AllowOverride all
Order allow,deny
Allow from all
</Directory>

<VirtualHost *:80>
DocumentRoot "C:/aweb/freehosting"
ServerName pcsny.org
ServerAlias www.pcsny.org
php_admin_value open_basedir "/"
Options +FollowSymLinks
RewriteEngine On
RewriteRule ^/users/([^/]+)(/(.*))?$ http://$1.pcsny.org/$3 [R=301,L]
RewriteCond %{HTTP_HOST} ^pcsny\.org
RewriteCond %{REQUEST_URI} ^(.*)
RewriteRule (.*) http://www.pcsny.org/%1 [R=301,L]

</VirtualHost>

<VirtualHost *:80>
ServerName pcsny.org
ServerAlias *.pcsny.org
VirtualDocumentRoot "C:/aweb/freehosting/users/%1/"
php_admin_value open_basedir "C:/aweb/freehosting/users/"
</VirtualHost>

################################################## ##

but this way it does not jail user in their respective folders
so i tried this
VirtualDocumentRoot "C:/aweb/freehosting/users/__%1/"
php_admin_value open_basedir "C:/aweb/freehosting/users/__"


but alas does not work
error logs say cant find %username%__

how to fix it?
i am almost done there
</VirtualHost>