This is a very nice writeup. The part that im still a bit unclear about is:
Imagetype: Tells the Image Loader which area of the Rom you would like to refresh, for the bootloader it has to be B, for the OS it has to be K.

Out of curosity, how did you learn about this? An insane amount of trial and error?

Edit, I see.. B is the bootloader K is the file with the ROM. So one have to copy all 4 files into the SD card in order for it to work.
(dont need it now, but I know I will eventually brick mine and I will need it)