if you're like me and have hboot 1.57 and cant get the RUU to install, mine would give up after about 5 minutes, this is what i did.
1. Unlock bootloader via fastboot
2. Install TWRP
3. Download any CM (nightly, SS, RC, or stable)
4. Root CM
5. Run firewater
After that you should have S-Off, I can't say it will work 100% of the time and take no liability if it bricks your phone (which it shouldn't). But, it worked for me first time like a champ.