Sweet, this worked pretty well for me on my Virgin Mobile Supreme (ZTE)... I had to run it twice (on my phone and twice on my wife's) before it was successful.
Both phones, on the first running of the batch file, failed the installed, but after reboot and subsequent run, it worked (it did note the prior failure in the text).
That was the most annoying startup sound possible, what were they thinking?? Thank you for this info!!
EDIT: after rooting, root browser was all I needed to change the permissions for the sound file, and then rename it to old_
PS: My TrendMicro wanted to delete a file in the zip called "pwn"...this is essential to the batch file running. I tried without it and
the batch would not run, it's a resource file for the rooting exploit I believe. I just told Trend Micro to **** off momentarily...