You need to use either apt-get ot dpkg to install packages on Debian. KPackage , I believe, is for RPMs. Since Debian uses a different database for packages than RPM, you are going to get errors when trying to use a package manager like KPackage.
apt-get is very easy to use. The first thing you will want to do is load up a file called /etc/apt/sources.list with a number of sources for packages that you want. Since you are using the Woody (stable) version of Debian, it added all the packages to apt off of the CDROM that you have. I know that the Woody CDROM contains the most stable and tested versions of packages for when Woody became an official stable release of Debian. (KDE 2.2, Mozilla 1.0, Open Office 1.0, etc.) To get more recent versions of certain packages, you need to tell apt where to get them from. To do this, you edit /etc/apt/sources.list.
Here is what my /etc/apt/sources.list file looks like:
# Official Debian
deb
http://http.us.debian.org/debian stable main contrib non-free
deb
http://non-us.debian.org/debian-non-US stable/non-US main contrib non-free
deb
http://security.debian.org stable/updates main contrib non-free
# Open Office
deb
http://ftp.freenet.de/pub/ftp.vpn-junkies.de/openoffice/ woody main contrib
# KDE
deb
http://download.us.kde.org/pub/kde/stable/latest/Debian/ woody main
# Blackdown JAVA
deb
ftp://ftp.tux.org/pub/java/debian woody main non-free
# VideoLAN
deb
http://www.videolan.org/pub/videolan/debian $(ARCH)/
# Mplayer
deb
http://marillat.free.fr stable main
# Debconf/helper/backport of sid stuff
deb
http://people.debian.org/~aurel32/BACKPORTS stable main
# Lame
deb
http://dijkstra.csh.rit.edu:8088/~mdz/debian woody lame
# K3B
deb
http://www.planet-moll.de/debian woody main
# WINE
deb
http://www.fs.tum.de/~bunk/debian woody/bunk-1 main contrib non-free
# Backports to Woody
deb
http://www.jarre-de-the.net/computing/debian/ stable main
# FilmGIMP
deb
http://www.cse.unsw.edu.au/~alau/debian/ ./
# QT
deb
http://klokan.sh.cvut.cz/~medon/debs/ woody/
# GNOME 2.2
deb
http://ftp.acc.umu.se/mirror/mirrors.evilgeniuses.org.uk/debian/backports/woody/ gnome2.2/
# Mozilla 1.3
deb
http://ftp.acc.umu.se/mirror/mirrors.evilgeniuses.org.uk/debian/backports/woody/ gnome2.2/mozilla-1.3/
After you add any sources to /etc/apt/sources.list, you have to run apt-get update:
$ apt-get update
This will update your package database with the most recent versions of any packages that are defined in your sources. To test it out, try to get Mozilla 1.3:
$ apt-get install mozilla
That should download and install Mozilla 1.3.
If you want to add a CDROM source to apt, you first put the CD in the tray, close it, and DO NOT MOUNT IT. Then you run this command:
$ apt-cdrom add
This will mount your CD, and scan it for packages, and put that CDROM into /etc/apt/sources.list. Then, you just install packages like normal:
$ apt-get update
$ apt-get install packagename
A nice tool to get first is a package called synaptic. This is a graphical front-end to apt which lets youjust point and click your way to installing packages, and upgrading packages. It tell you what packagges you have installed, and gives you the entire list of packages availible to you that are defined in your sources:
$ apt-get install synaptic.
To find sources for apt, you can take a look at this site:
http://www.apt-get.org. You can scan the listings to see if there is anything in there that you want. Just make sure that you only use sources for Woody (stable.) If you start mixing sources for Sarge (testing), and Sid (unstable), you WILL run into problems later on.
For further reading, you might want to read up on apt here:
http://www.debian.org/doc/manuals/apt-howto/index.en.html