And I would keep this handy - at the bottom are the links for the 'Easier to Read' manuals. The 330 manual has been combined with the 396, but it should still be very useable.
I'd also read Paul Opitz's (UPMan's) article, as well as reading up on Trunking, if you are not very comfortable with the concepts.
Have not checked these recently (last trip May 2006). I think the PD is encrypted to protect the guilty. Seems like FD fireground is too, for some weird reason.