how do you build a custom install disk/iso?

I need to build four custom install CD's, each with different ports/
pkgs that install themselves. Preferably, I'd like the disk
partitions to be set up and newfs'd as well, so that I can stick one
of these disks in a new system and have everything installed, conf
files set up appropriately, etc.

I can't find info on this in the FreeBSD handbook, this group, etc.
Can anyone point me to info on how to do this?

Thanks!

" " writes:

> I need to build four custom install CD's, each with different ports/
> pkgs that install themselves. Preferably, I'd like the disk
> partitions to be set up and newfs'd as well, so that I can stick one
> of these disks in a new system and have everything installed, conf
> files set up appropriately, etc.
>
> I can't find info on this in the FreeBSD handbook, this group, etc.
> Can anyone point me to info on how to do this?

Start with "man release" and "man sysinstall".