[exim] Help Request please

I am trying to replace a routing server that is not very reliable with
exim i have one more stumbling block. I have a group in the ldap server
which looks like this what I need is a router that will check to see if it
is a group by checking that the inetMailGroupStatus = active then extract
the uid for each uniquemember, append the domain and then pass it to
another router for delivery that will check to see if the individual mail
addresses is valid and then deliver.Can someone help me please or when can
I get a config example.

A typical group object looks something like this:

  dn: o=groups
  Object Class          top 
                        groupOfUniqueNames 
                        inetMailGroup 
                        inetMailGroupManagement 
                        inetLocalMailRecipient 
                        nsManagedMailList 
  cn: Information Systems
  uid: groupid
  mail: groupid@mydomain
  uniquemember: uid=member,dc=mydomain,o=top
  uniquemember: uid=member,dc=mydomain.o=top
  uniquemember: uid=member,dc=mydomain,o=top