@bert smith
That's great you've worked it out yourself. Replacing images in logos isn't too difficult with the right tools and like most tasks when done once it's easier ongoing.

@osiris
Not as imperative to have a copy of it because region 16 is not unique to each device like nonvol region 41 or 154, the nonvol being rewritten to update it on each boot and "device specific" as you know. It's simply best to dump 16 before messing with flashing a different file. Then if you flash something incompatible you can flash back the original, or image modified original as he has. The worst that can happen with the wrong data in region 16 is that the device will boot without proper logo splash screen display and possibly, depending on series/type as a basic device without premium features. Think 1xxx for example, many different OEM logo BINs that enable/disable features such as LA, VCJ, SL, and even TTS in some. Therefore flashing the senior logo can enable everything even in the 'povo-pack' 1300, except BT of course. However in many other devices there's no such capability to turn firmware features off and on using rgn16. Other series which used 'crippled' logos were nuvi 2x5/W and 7x0.

NB: This thread can be marked as 'SOLVED' as any similar queries can be easily addressed by reference to the threads linked in earlier posts here.