The real "DRM" of that game were the cartridges - even if you cracked the same, you couldn't burn it to a CD like the Playstation games, and N64 emulation on PCs was mostly a pipe dream at the time.
N64 game cracks were desirable even without emulation though. There had been "universal" carts (e.g. Doctor V64) that would enable running a game image on a retail console.
[1]https://en.wikipedia.org/wiki/UltraHLE [2]https://en.wikipedia.org/wiki/Banjo_Tooie