WinXP can only handle the MuchFX2 name with superscript when it's set to display non-unicode apps in English. When it's set to display Chinese (as is the norm on this computer) there's a question mark where the '2' is in the MuchFX2 name in the Winamp plugin selection screen, and it won't load.

I tried editing the dll, replacing all instances of the question mark that follows MuchFX with a normal '2', but it didn't work...