This was made using the same method used to make a Droid Razr ROM, except on the Droid 4, so it should theoretically work. Here is a stock rom in one zip file, instead of three .exe files as user myfishbear posted here.
This ROM is pre-rooted
Slight fix as of 2/21 12:15 am PST
USE THIS AT YOUR OWN RISK. IT IS UN-TESTED AS I DO NOT OWN A DROID 4 (yet).
Size: 255.85 MB