It sounds like you're using the "VZW ROM Complete" from
this thread, in which case, that ROM already has the stock radio built-in. Once you install the ROM, that's it, you should be good to go, no need to install the radio seperately. Perhaps that's why you're having problems installing the radio, because the same version is already in there? Just throwing that out there... not really sure if that would be a problem or not. And if you're not using that ROM, then I would give it a shot, because it worked perfectly for me.