emp-hl.iso is proprietary to the original equipment manufacturer (OEM). Distributing or downloading it from third-party sites (e.g., archive.org, random industrial forums) may violate copyright or software licenses. However, if you own the original hardware, creating a backup copy from your original CD is legally protected in most jurisdictions under fair use / right to repair.
Demystifying emp-hl.iso: What It Is and Why Gamers Are Talking About It emp-hl.iso
: The standard file extension for an uncompressed optical disk image. emp-hl