How to configure Webalizer for grouping

Hi. Anybody knows how I can configure the Webalizer to group my referrers?

Webalizer now shows me refs like this:

h**p://www.shemp.com/shemp004.htm
h**p://shemp.com/hardcore.html
h**p://shemp.com/fetish.html
etc...

and

h**p://www.thumbzilla.com/archives/mature.html
h**p://www.thumbzilla.com/archives/plumpers.html
h**p://www.thumbzilla.com/archives/fetish.html
etc...

But I want to see simple domains without extra pages, like:

h**p://www.shemp.com/
h**p://www.thumbzilla.com/
etc...


I know that I can use command GroupReferrer in the config file, but then I must Group every single domain by hand (like: Group referrer shemp.com, groupreferrer thumbzilla.com, ...). Is there any way Webalizer could automatically group all domains like Wusage does?

Thanx.