I've been following since the
There's two parts to the guide
1.how to edit the text
2.how to patch your game
I just used it earlier today.
EDIT: Sorry, misread Smugleaf's post but i think you gotta use the second part of that guide and then use the xdelta GUI to make your own patch using the edited rom and the unedited rom and it should appear in the xdelta folder.