[exim] Enabling Filters

Hello All.
I just created a script for filtering emails for one domain. However, I
don't know how to enable it and where to save that file. I'm running Exim
with MySQL DB. I have been reading the manual and I can't see (at least
just yet) the answers I am looking for. I need a solution to this asap as
out customer has been hounding me for days now.
I hope someone can help me.

Thanks in advance!


Cheers,
DOODS