32x uses the same header format as Mega Drive.
Editing the country code should do the trick, iirc.
Yes, that works for most of the games/ROMs, but not these two. Let me quote from the thread at elotrolado.net:
"Editing the header is impossible, apart from the header, it has level 2 protection, that is, the cartridge checks at what speed the mega is going and if it does not match that of its region, the [region lock message] shows."