Irritating Maze - Controller hack?

NeoCverA said:

This is an old subject that surfaced in 2004-5 i believe. I know there's a cheat that enables controller mode via unibios (thanks to Razoola)but I can't even get to the unibios since its running its own bios. When I do a funny trick to get to unibios, my controller and buttons don't work - so can't access the cheat menu.

Can someone help with this?

(I'm guessing I need a patched P rom file?)

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