Originally Posted by Kinetic
I am unable to read from the original copies (either the physical ones using the Amiga, or IPF ones using WinUAE) due to copylock.
The problem is not related to the Copylock protection. Lemmings doesn't use standard disk format thus you can't read it without using the original custom loader. So again: Rip/Disassemble the loader from the game and you can read the disks/files. After all, the game needs to read its own files so there must a be a loader able to handle it somewhere in the game.