Has someone tested this with busybox-power? I got errors during flashing with u-boot-flasher (related to /dev/mtd3 and whatever) Also, booting the standard kernel (omap1, installed via u-boot-flasher) and some others via very early u-boot menu seems ok, but if you aren't quick enough to close the slider afterwards BootMenu can't boot using /etc/bootmenu.d/*.item and has troubles with mtd4.

I'm actually not sure if using /etc/bootmenu.d/ is "the best way" as it conflicts in the above way and also during updating u-boot's menu (manually have to move backupmenu.item and recovery.item out of there to allow successful menu creation)