https://garage.maemo.org/plugins/scm...nu&view=markup You'll note that when you use the on-device initfs flasher, a bootmenu.conf is mentioned --- take a look at the example file I link to above. The example actually boots internal, mmcblk0p2, and mmcblk0p3. All you have to do is change the menu names (and install the relevant OSes to the relevant partitions .