estel i wish you to get a corrupted MyDocs and see how your theory works in that case
I really do not see reason to use uboot image without attached kernel. kernel nand area is cleaned whole at one time. also you can configure default kernel for booting via etc. and as I remember correctly there was some problem with that patch... also I am not archeologist and I do not have time for finding some patch somewhere on internet. If you want to review some patch, please at least add link to it...