Hello, first of all, I must admit that I still use SuSE 7.2 and never have done anything with apt-get. I thought it was a debian thing and Gentoo had something like it but improved, but that was it. Obviously, it is not it. I can therefore not help you with 1 and 2, but have a suggestion on 3. Please read on. First wrote:
3. The unstable kde3 can not be installed.
You can do an ftp update with YaST 1 (at least it is possible in 7.2) using the LinuKS service from SuSE. If there is no YaST 1 anymore (I heard something like that) I suppose there might be some replacement for it in your version. If not, you'll have to manually download these files and install them. They're rpms. Anyway, I upgraded KDE 2.1.2 to KDE 3.0.3 this way and it seems to run fine as far as I can see. I use WindowMaker 80.1, I was just curious about the latest KDE. When I want to install or remove software using YaST2, it prompts me that kdelibs need to be installed, but it should already have been with YaST1, so I ignore it and everything goes fine, the few times I use it. I suggest you try to install KDE3 this way, it might work for you as well. Good luck, Vinay