Secondary Bootloader Plan

My requirements don't really fit into what remote update can do. I need to support multiple images on flash with the ability to boot a selected image. In addition, I have to support a non-standard communication system and command structure to handle firmware updates.

From what I have found via more searching, it looks like if you don't use interrupts during the booting part of the operation, then there will be no problem in writing over the .exceptions section of the secondary bootloader with the new application image.