As long as it exists in your version of the game, yes.
However, the code won't allow you to customize Ribbon on the american version, because Ribbon doesn't exists there.

Me and a couple of other hackers are currently trying to work on a code that adds Ribbon to the American version. We already know how to add new abilities to the PAL version, but there's still a few things that need clearing up for doing this in the American version.

If you're interested, two other codes I can do now would be ones to allow customizing of Capture and No AP. Let me know if you want them. I can also do ones to allow customizing weapon abilities on armour, and vice versa. (They still work 100% the same.)