Are the packages in .tgz format?
If so try the following:
open a terminal and go su.
mount the cdrom.
cd to the directory that contains the package that you want.
type:
pkg_add whateverpackage.tgz
I've only tinkered a little with Freebsd so this is a bit of a guess.
With that said, go here and read, read, read.
http://www.freebsd.org/doc/en_US.ISO...ooks/handbook/