Thanks, DrByte. :)

@mc, I looked at the file and it seems changeable. Only, this line stumped me:
$zco_notifier->notify('EP4_COLLATION_UTF8_ZC13X');

Any chance you could take a look at the code and specify the changes needed?

I also found UTF-8 references (in notation) in two other EP4 files. Can that be ignored?