Hi!
1st I think the installation of kernel-power-headers_2.6.28-maemo46-wl1_armel.deb is not neccesary unless you want to make your own module in the device(For developers only)

2nd the installation of kernel-power-bootimg_2.6.28-maemo46-wl1_armel.deb and the whole multiboot is also optional. You won't need all that unless you have nitdroid installed.

Those I mentioned take up a huge amount of rootfs space so unless they are needed I don't think you should include them on your tutorial.

And lastly thanks for the video tutorial