Standard Disclaimer: Neither I or droidrzr.com are responsible if your device bricks and becomes an expensive paperweight.
To change the logo you need adb and motorola drivers setup. Once you have that done or already have it set up follow the steps below...
- Download a new logo from (few that I've put together).
- Find the downloaded logo and move it into the platform-tools folder where adb is located (for example the directory I use is C:\android-sdk-windows\platform-tools).
- Open a command window in the platform-tools directory (if using windows right click on the platform-tools folder while holding shift down).
- Put phone into fastboot mode (power off then hold down volume down then power button for 3 sec).
- Connect via usb cable.
- Now in the command window type the following command: fastboot flash logo logo.img (where logo.img is the name of the boot logo so if I were flashing my parental advisory logo I would type fastboot flash logo parental_advisory.img).
- It should only take a second to flash and should say if it flashed ok and it should tell you it's finished. Now type fastboot reboot and enjoy your new boot logo.