I have updated the code to support unpacking of blobs from the Transformer Prime that includes the signature block (backward compatible with no signature).
I have also updated the packing to to add that signature back in (pass the -s param). This may potentially be useful once the bootloader is unlocked, if we still need the signature on it in order for it to flash.
I have attached windows executables as well as the updated source and source built with a Visual Studio project.
rayman84, feel free to incorporate this modified code into your git repo.