[Exim] exim and aliases.db

Dear all,

I can't get exim to use /etc/aliases.db instead of /etc/aliases. I've
compiled the db file using exim_dbmbuild and think I've got the correct
transport/directors.

Can anyone post/suggest the correct transport/directors to implement this?

Also, I noticed a while ago that there was some official training for exim
at Cambridge Uni - Is there any more scheduled?

Thanks in advance,

Paul