I am REALLY sorry to write this, but all my efforts to install KDE on my N800 were without any success. I am using a 2Gb Sandisk MMC. I tried first with the MMC card boot, following this instructions: http://thisweekinnuclear.com/KDEonN800.html I was able to clone the OS to the card, and to boot from it, but when I was supposed just to click in the extra menu to start KDE, I had a blank screen without anything possible to do.