Unpack into \sourcemods\, overwrite existing files. This patch is cumulative - in includes changes from DI Hotfix #00. Patch info: - Added autosave triggers to the four storyline maps. - Upper parts of the apartament staircase in the Consulcast are no longer accessable (which is how it was intended). - Fixed possible issue with players getting stuck in the elevator in the Worker Chasm. - Slight improvement on exterior and interior level design, including additional offshoot rooms and passages for added map space. - Burning zombies are now allowed to cast light on the Construction level. - Players can now use the flashlight in Chapter I (the HEV suit is no longer required).