In other words, copy JK.EXE, JK-Extension.dll and the Resource folder from the 'Jedi Knight - Dark Forces II' folder and/or JKM.exe from the 'Jedi Knight - Mysteries of the Sith' folder to your game folder(s). Simply copy the contents of the appropriate included folder to your game folder, overwriting any files. This makes them compatible with digital releases like those from Steam and GOG, which have already been patched to remove CD checks (and, therefore, would cause the the original unofficial patches to either fail or introduce CD checks). These are the pre-patched versions, meaning that the original executables have already been patched.
Most users choosing to play these games on modern Windows will want to use these. The unofficial patches improve compatibility with modern Windows, add team chat in multiplayer and are required for some mods (particularly Jedi Knight Enhanced and Jedi Knight Retexture Pack). This is a bundle and re-upload of the 'Unofficial Patch' executables for Jedi Knight: Dark Forces II and its expansion, Mysteries of the Sith. Jedi Knight: Dark Forces II & Mysteries of the Sith (1997-98) by LucasArts
