Hey Scotty, why don't we just get the bootloader unlocked, load a recovery and wipe the cache and dalvik cache, see if that works, then flash a rom from there if it doesn't?
I know the phone will still be S-on, so couldn't we just flash the kernel through fastboot after the rom install?
Also, is there a copy of the exact same RUU currently on the phone anywhere on the interwebz? We can flash it from the stock recovery if it's on the SD card.
I'm firing in 25 different directions right now, so I may not be making sense.
"Not everything that counts can be counted, and not everything that can be counted counts." Albert Einstein