How to root the Motorola Droid RAZR
It has only been a few days since the release of the Droid RAZR and already the developer community has figured out a way to root the phone. The method below is for WINDOWS only and is taken from Droidforums
Rooting voids your warranty. Not following the instructions carefully might result in a bricked phone. Proceed at your own risk!
Step 1: Download and install Motorola Drivers for your Windows PC (this doesn’t work on other operating systems): 32-bit or 64-bit.
Step 2: Download DooMLoRD_v2_ROOT-zergRush-busybox-su.zip and extract contents to your PC (desktop would be a good place).
Step 3: From your Droid RAZR’s homescreen, tap Menu button and enable USB Debugging from Settings > Applications > Development.
Step 4: Connect your Droid RAZR with your PC and select Charge Only option from notifications drawer.
Step 5: Navigate to where the folder you unzipped in Step 2 to and open the folder and click on the runme.bat file and let it do its thing.
You only need to do this process once.