Import users based on cn value

I'm having difficulty importing users from eDir using the cn attribute. Is this possible ? I'm trying to avoid importing all of the default user objects that are created (admin, www etc....) All of our usernames starts with zeroes I've been using this as a search string.

(|(objectClass=Person)(objectClass=orgPerson)(obje ctClass=inetOrgPerson)&(cn=00*))

I did read in the Admin doc that filr does not support multi valued attribute but that it should still pick up the first value only. So I assumed that searching on cn is still supported?