I was actually wondering where you got this from (besides the Mupen source code - I agree there's 6 in there

), since two of those Europe codes seems only to be for non-game items when loading the full GoodName set. I was actually going to bring this up in my thread about the new rom cache system, since I'm currently thinking they should be moved. Either way, if anyone has gone further to document the N64 ROM format, I'd love to read that. I went through all kind of troubles to find out that the ROM internal name was SHIFT_JIS encoded. The good news is that eventually when RCS is merged, this will allow proper hires texture replacement for all games.
P.S. the MD5 fix is now in trunk. Not sure if its made it to the Windows port yet.