Ok, so here’s what you’ve been waiting for.
The DTR_Flash_R5E.06.01_setup should work for any radio that has a firmware version below R5E.06.01. The only previous version I’ve seen is on a DTR550 which had R5E.03.03. I don’t know what the Rev1 firmware version is, as it cannot be read by CPS.
The DTR_Flash_R5E.06.05_setup will only work when the radio has firmware that is AT LEAST R5E.06.01, so flash with the above software first.
Download and follow the DTRFlash_UserGuide or you will have problems, especially if you’re running Win7. No idea if it works on Win8, but it certainly doesn’t work on OSX! 
Hopefully Motorola doesn’t have a problem with me posting this. They gave me the software for free and I have not been told nor have I seen anything in the documentation or online that says that I should not distribute it.
If someone knows of any reason this software should not be made available, please let me know. I have no interest in getting in trouble.
DTRFlash_UserGuide.pdf (210.9 KB) DTR_Flash_R5E.06.01_setup.zip (9.6 MB) DTR_Flash_R5E.06.05_setup.zip (9.6 MB)