>>A.J.G: I can't get su to work in knoppix-installer as debian so I use the root shell as I know it always works.

Have you edited /etc/sudoers to include your username as a sudoer? I have Knoppix > HD 'Debian install' & use su in the regular shell all the time but the HD install will not automatically set up users other thaan 'Knoppix' as sudoer.

>>spydie:When you say I should get the package from debian do you mean download it at debian.com or what?

>> How do I add it to the menus myself?
>> Do I add it to the menu well in KPackage?

Some of this has already been answered so is a bit of a repeat. Debian packages are added using:
1.dpkg (text mode package handler)-works great for some uses but you have to know the name of the pkg you want to add
2.deselect (has a list of packages but still pretty base-level)
3.apt-get text mode package handler which can access any available packages in it's 'sources.list'
4.Kpackage (KDE graphic mode package handler) good & convenient to use (actually a gui front end for apt-get)
5.Synaptic- another gui front end for apt-get. IMHO Kpackage is just as good but sometimes synaptic is a little easier to find things as it uses different sorting
Apt-get actually uses dpkg to do the work of installing the pkg. Kpackage & Synaptic also use dpkg through apt-get

So, for a nOOb (which I still am), first thing to do is (as root) 'apt-get update' which updates your 'sources.list' so you now have a complete list of available packages. Then select & install the package you want using Kpackage or more directly using 'apt-get install'. Knoppix doesn't come with Synaptic so for a practise run try 'apt-get install synaptic'. Most of the time things go OK but sometimes there are dpendency problems or conflicts. Currently I still haven't managed to install Kpat because of dpendency conflicts.Kpat is KDE's solitaire game...actually a much more polished version of the crappy 'ace-of-penguins'game.

To add menu items:
1.use Settings>Kappfinder. KDE will automatically scan for & add new executables
2.use Settings>Menu Editor to add your own
3.create your own desktop links. Right click on bare desktop, the 'add application'.

snOwflake: Stay with it. I could have written your exact same post a few months ago (I fact I did...go to Linux Format forums & do a search for posts by CrashedAgain.)