Came across a really interesting article about the game. The hackers responsible for releasing this patch revealed that Goldeneye apparently had a hidden ZX spectrum emulator hidden in the retail cartridges! Rare apparently left them in there but coded it, so you couldn't access the ZX Spectrum part of the cartridge. Theres basically a list of hidden games in the cartridge that was packaged in with Goldeneye 007. If you are interested in either checking out the patch or at least reading more into it, here's your source info.

Romhacking.net - Hacks - GoldenEye Spectrum Emulation Unlocked