The PHP script in this directory can produce a overview of the website traffic by site or period.

There are a few things that need adjusting and fiddling

Database:
You will need a sql database like mysql and import the stats_db.sql into it.
The login and password for the database is defined in the top of the php file.

Paths:
There are a number of paths defined in the php file so it can find the webalizer.hist (or whatever you call it).
It is defined to /home/domains here but might as well be /www or /var/www in your case.
It also assumes that that default path for the stats relative to the webroot is stats/

I think this should do the trick for you but be free to adapt it to your needs.

Cheers
Seth
seth at arosa dot nl