followed the instructions here http://wiki.nitdroid.com/index.php?title=N900-install

partition:

umount: cannot umount /dev/mmcblk1p1: invalid argument


installation:

wget http://downloads.nitdroid.com/multiboot_0.2.5_armel.deb
http request sent, awaiting response....404 not found
05:35:57 ERROR 404: not found.