I just went through the process again, and it seemed to work, but after flashing using safestrap and rebooting the phone, when I got to the final step of the startup wizard, and pressed "finish," it said:
"Unfortunately, Setup Wizard has stopped."
After I said okay to that, the screen went black. When I pressed power to turn on the screen again, I was at the lock screen. When I swiped to unlock the phone it made a screen unlock sound, but froze and didn't unlock. The same happens every time I turn the screen on and off. I'm unable to unlock the phone. I'm flashing from rooted official Jelly Bean OTA btw, not the leak.
The steps I took to flash the ROM were:
1. I accessed safestrap recovery.
2. I created a backup on my external SD card.
3. I set up ROM slot 1 and made it active.
4. I went to the "wipe" section and wiped Cache, System, Delvik Cache, and did Factory Reset.
5. I went to "Install" and selected the Vitreous zip file on my SD card. This seemed to work successfully.
6. I went to "Install" and selected the GAPPS zip file on my SD card. This seemed to work successfully.
7. I selected "Reboot."
8. I got the splash screen logo with the Nexus-style "X".
9. I got to the setup wizard. Then what I described above happened.
If someone could tell me what I'm doing wrong, I'd greatly appreciate it. Thank god for Safestrap backups. I would have bricked my phone 3 times over if it weren't for that.