If you've picked up a Motorola Droid 3, and love to tinker with things, listen up -- files have surfaced that will allow you to restore your D3 to a "factory-like" state and, more important, recover a unit that won't boot up. We have to be clear here -- this is not a standard stock .sbf file. If you use these files, you will no longer be on Motorola's upgrade path. This is for emergency use (or for hackers to fiddle with) only.
Now don't get scared off. While nobody is 100 percent sure, it looks like this is a copy of the software that Droid 3 soak testers were using, and it was pulled back for some reason or another by Verizon and Motorola. They aren't some files cooked in a random hackers basement, they are signed by Verizon with production keys. The only known drawback to using them is that you'll not be likely to get a future OTA update because you're running the wrong version -- which beats the heck out of a bricked phone you can't use.
Like all things Motorola, they might not be valid links forever. If you love your Droid 3 enough to dig inside and try to break it, go grab them and squirrel them away for a rainy day. Visit the source link and read all the details, and if the day comes when you need them, you're covered.
Source: XDA-Developers; Thanks, Stevie B!