So, the plan for <device>.conf.. Ignore [] seperaters when creating your own *.conf...

[(1) Use the *.dts name, for the file name, and --dtb call...]
[For the Beagle xM in v3.7: omap3-beagle-xm.dts, so file will be "omap3-beagle-xm.conf"]

#!/bin/bash
#Reference: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=tree;f=arch/arm/boot/dts;hb=refs/tags/v3.7
#        --dtb omap3-beagle-xm (BeagleBoard xM:supported)

[(2) Bootloader]
[FIXME: website address, should be defined as a variable...]
[For the xM: http://rcn-ee.net/deb/tools/latest/bootloader-ng ]
[format of file:]
[ABI2:BEAGLEBOARD_XM:SPL http://rcn-ee.net/deb/tools/beagleboard/MLO-beagleboard-v2012.10-r1]
[ABI2:BEAGLEBOARD_XM:BOOT http://rcn-ee.net/deb/tools/beagleboard/u-boot-beagleboard-v2012.10-r1.img]

#Bootloader: http://rcn-ee.net/deb/tools/latest/bootloader-ng
board="BEAGLEBOARD_XM"

[(3) Partition Setup]
[omap and a mainline u-boot]

bootloader_location="fatfs_boot"
boot_partition_size="64"
spl_name="MLO"
boot_name="u-boot.img"

boot_image="bootz"
boot_script="uEnv.txt"
boot_fstype="fat"

[more to come...]