So I downloaded the Ultimatum S3 1.0.1 zip file (from here) and added it to my /media/sdcard on the phone. I then used ROM Manager to install Ultimatum - I had already done a backup an hour or so before so I told it to just do a wipe. Phone reboots, Ultimatum says it's installing but admittedly the message about someone pooping on me made me feel a little uncomfortable (like it wasn't a legitimate ROM install) which was exacerbated when the phone went into a continuous reboot loop. It'd vibrate, the Samsung logo, then the Galaxy S3 logo (or visa versa order), then the phone went black and it'd vibrate off, vibrate back on and repeat. I thought "OK, maybe something didn't take..." so I rebooted back into Recovery, wiped all user data and cache, went into advanced and wiped delvak or whatever, and then tried again. No workie workie. One thing that I thought was strange (or maybe it's normal?) is when I go into "mount and unmount" that the system and data partitions shows as unmounted because the option both say "mount system" "mount data" - shouldn't it be the opposite if they're already mounted? I tried simply mounting them but alas that didn't work either. I'm restoring my ROM I backed up but what in the world did I do wrong?