Kawecki: The third BYTE in there, which is unknown, I have a clue on. I don't know specifically why it's 128 for a thumbnail, but the 0x0D on a geometry RSR seems to fit perfectly with the following load line from most CR2s:

   geomHandlerGeom 13 hip  

So, I'd reckon there's a direct code reference therein. It might be possible to change it to 0E and then in a CR2 change the geomHandlerGeom lines to say geomHandlerGeom 14 hip and so on and have it load properly. Not that there'd be any point to doing so, but still.

I'm the asshole. You wanna be a shit? You gotta go through ME.