OK Moshing once you install from app manager you need to find the debian Image Installer in Extras menu. Click on it and when its done it will tell you successfully installed. At some point it will ask you which mmc card you want to install easy Debian. select mmc1(external) or mmc2(internal) for N800. The whole process takes me about 30-40 minutes from start to finish. i've done it about four times. Follow Qole directions to the letter.