For the full experience, open ast_msu.docx and follow the instruction there to add English voices and orchestral music to the game.
The bszelda_ast.smc files in the W1-W4 were already patched with the MSU patch files by me, so there is no need to do that again, but you need to add the audio files yourself. :-)
Go to the folder W1. Load bszelda_ast.smc in your emulator of choice. Follow the instructions in game.

Enjoy!
Ok Impala!
https://okimpala.net
