NoCD designed specifically for London GTA addons. Addons, like the game, were sold on CD-ROMs, and also had anti-piracy protection, which consisted in the refusal of the product to start without a disc inserted into the drive.
Move the NoCD crack to the game folder and open it via the build DOSBox+Win3.11. Accordingly, the game itself should be inside the assembly in the "Disk_C" folder