The DVRFlash instructions seem to have been written by someone who's not a native English speaker, as they are confusing and unclear. For example, it says:
"In the following samples, the kernel firmware is 'R5100004.133' and the normal firmware is 'R5100104.133'."
Okay, but that would imply that the lower numbered firmware is the new one, which doesn't make logical sense, so I can't rely on assumptions or things that aren't explained clearly and correctly. Likewise:
"./DVRFlash -vf "PIONEER DVD/RW DVR-105" R5100004.133 R5100104.133
The command above will force flash a 105 compatible drive with the Pioneer DVR-105 v1.33 firmware The command above also works with USB and Firewire drives."
suggests the exact opposite of what was stated earlier, since performing functions on files via Terminal starts with the original file name and the second file parameter provides the name of the one you want to change it to or use to perform the action on the first. So unless I'm missing something, these instructions are a good way to screw up the whole thing and accomplish nothing at all. A good English speaker with a firm grasp of grammar, sentence structure, and the technical knowledge is needed for a complete re-write of that Read Me file.
Using this command format:
"./DVRFlash PIONEER R5100104.133"
seems to suggest that I can accomplish what I need just be invoking DVRFlash and giving the name of drive and firmware file I want to use to flash to. Is that right?
It's not that I don't like 1.28, it's that I don't know exactly what the effect(s) will be, other than to make it region-free, so in case I don't like it, I would need a way to get back to the original one.