[Zope] zope + apache + rewrite

[Ruslan Spivak]

Hello, zope users.

I need help. i have apache + zope + VHM configuration:

<VirtualHost www.is.lg.ua:5000>
  ServerName www.is.lg.ua
  RewriteEngine On
  RewriteRule ^/(.*) http://192.168.1.1:6080/VirtualHostBase/
      http/www.is.lg.ua:5000/is/VirtualHostRoot/$1 [L,P]
  ProxyVia on
</VirtualHost>

In root of zope i have /is folder.
All this works, but in apache /cgi-bin directory i have irc.cgi script 
and i need to call www.is.lg.ua:5000/chat so that 
www.is.lg.ua:5000/cgi-bin/irc.cgi will be called.
I tried 'ScriptAlias /chat /cgi-bin/irc.cgi' inside VirtualHost, but 
that doesn't work, because all mapping goes to zope, so i need probably 
the rewrite rule, but dunno how to make it work.
Maybe you can help me with that?

Your help is very, very appreciated.
Thanks in advance,
Ruslan