installing vpopmail but I want to use mysql

[Liquid]

Hi,

I've recently installed qmail, and I'm using the included qmail-pop3d as
the pop server.  This is all working great, it's running on a small
machine I use myself as a router/firewall and I just thought I'd play
with email.  Now, I have several domains I am hosting on the box using
bind, and now I'd like to use them for email as well so I'm looking into
installing vpopmail.  I know about the fbsd mail-toaster and I think its
great, I only wish I saw it before I installed everything.  

I found a site:
http://nav.bandersnatch.org/clues/qmail-cookbook.html#install-vpopmail
that shows how to install vpopmail using mysql among other things.  I
noticed that it's a how-to targeted at rh users so I didn't use it for
more than insight on my installation.  The thing is though that I
noticed that the author wants the users to modify vmysql.h before the
./configure make... etc.  If I install vpopmail from /usr/ports/mail I
wont' have the opportunity to do so obviously, so I'm wondering if on a
freebsd system that is even necessary, or if there's some other way,
after vpopmail is installed, to tell it what/where the database is.

Thanks,
Sandro M.