The nemo mobile project releases ready made raw images that you write to an sd card. I should be configured as follows:
partition 1: root filesystem
partition 2: swap
partition 3: /boot

So something like this:
ITEM_NAME="Nemo"
ITEM_KERNEL="uImage"
ITEM_DEVICE="${EXT_CARD}p3"
ITEM_FSTPE="fat"
ITEM_CMDLINE="root=/dev/mmcblk1p1"

Should work, right? But nope, it loads the right kernel (as does run sdboot in the console), but then it just shuts down.

Any suggestions?