To show this in action, i've deodexed and prerooted the WWE 10.4.11.13 update, as well as removing the recovery overwrite function. This should let developers have a look at what's involved in creating them, provide a deodexed base to work from and provide modders with a deodexed ROM to tweak.
A good starting point to more custom ROMs I hope!
- DOWNLOAD (ROMraid) - MD5: e2926f6e6b8f0961a9361c32c635e4e4
Note that if you are flashing to / from a different region (e.g. WWE<>TW) then as your device is being re-partitioned, you may need to wipe. If the initial flash fails, wipe data, then flash again. If this flash still fails, restart recovery then flash again.