Use Motorola's RSDLite tool and fxz file from sbf.droid-developers.org/edison/list.php
Make sure you are using fxz that is same or newer version than what you have on the phone.
version 5.5 is GB
version 6.7 is ICS
SlimBean cm10.2 is really good custom ROM.
Originally Posted by WraithTDK
So I've been going over my options for for getting Google Now on my phone, and lamenting the lack of Jelly Bean support, and I'm finally starting to feel like maybe trying out a ROM like Cyanogenmod. Just one question: if I try this, can I go flash stock again if I don't like it?