I don't know if there's a chip or anything, but you can make an ISO of the Japanese CD on your computer, then use SCDConv to convert it to a European country code. I believe you can dl scdconv in the Misc section of this site.
Sorry, I'm not in Europe. I live in the states right now. I do have a model 1 but its busted. My friend is taking a look at it but I didn't think much of it since I got the x'eye. But maybe if he has time he can make the mod based on your tutorial since he does all my electrical moddifications to systems.