[exim] Creating a Simple Mailing List or "Mail Groups"

I need set EXIM to route messages to local users according to
/etc/mail/aliases with sendmail style virtual email groups. I have created
individual files for each group which contain the actual local user names
and have used :include: in my /etc/mail/aliases file i.e.

everyone:        :include: /etc/<path to file containing list of every
account created on this server>

How do I go about it? i.e. creation of routers and any other configuration.

Thanks in advance
Eric