are u partioning ur n900?, ur emmc?? is it 8gb or still standart one??
reflash ur n900 to 8gb and 20gb try my method then
install nitdroid autoinstaller run it, then after first step tab new in xterm, close ito to the new one do this root cd /home/user/MyDocs bzip2 -d N12_Umay.tar.bz2 cd /home mkdir /and cd / mount /home /and cd /and tar xvf /home/user/MyDocs/N12_Umay.tar dpkg -i /home/user/MyDocs/ur nitdroid kernel leafpad /etc/multiboot.d/11* change ur device item to mmcblk1p2 i never failed with this method, and i still used nitdroid kernel final1 06, its better(for me) p.s http://www.youtube.com/watch?v=TInYpDY8KkI thats my nitdroid