Your new pack worked. I did Step 3 (I think--it's late, and I don't have the guide up) over again with your new pack, essentially reinstalled, and everything came out fine. Followed your linked guide for Region changing, and it now is in English. Was able to have two games up and running tonight via USB.
Again, many thanks for your help. This is an excellent guide. Should our paths ever cross, I will buy you beers until you decide you'd rather have something else.