I just wanted to report back saying that the pit file provided in the original post works great! For any interested in my setup/procedure, it was:
1) Flash the provided pit file using Odin 3.09
I wanted to switch to a Lollipop ROM, and another person in the main thread had good results with Validus, so I used that. Validus supports and recommends the F2FS filesystem, which requires a different recovery to install. So I followed the instructions found on the XDA Thread
and the Google+ page
for Validus install instructions.
2) Flash Chet's recovery
Chet's recovery, as downloaded from the above link, can be flashed from inside your current recovery. At least, I could from flash it from inside TWRP 184.108.40.206. Flashed it, rebooted back into recovery, and it loaded up the new one, nice as you please.
3) Format data, cache, and internal sdcard as F2FS. TWRP also gave me an error about preload, so I formatted that as ext4.
If you switch to a different ROM in the future, you'll have to remember to check if the new ROM supports F2FS. If it doesn't, you'll need to reformat those partitions to EXT4, or another filesystem the new ROM does support.
4) Flash Validus
5) Flash Gapps
Validus recommends the Paranoid Android Gapps, but the XDA threads have been closed. You can find the appropriate Gapps packages with a Google search; my search led me here
. Since the /data partition is now so large, I don't have to try and squeeze apps into the /system partition just to save space, I can install them normally. Thus, I installed the pico gapps, and just installed the other apps via the market. I recommend you do the same.
The result is a dark themed lollipop ROM that already seems pretty stable. I've been using it for less than a day, but I've noticed very few stability problems or other hitches. My thanks to Lorien_Silmaril and chris4284!