Heat of Battle is a BF2 mod focused on delivering top-tier animation, sound, and lighting, as well as fast-paced, intense gameplay.
This map pack will only work if you have Special Forces (xpack) content installed. If you have BF2 Revive or BFHD, this should work fine.
To install, just drop the levels folder into your Heat of Battle directory!
Please see the installation article for more details.