This is a small fix for the People Can Fly Deathmatch level DMPCF_Warehouse. Starting from 1.5 patch, either the map had a wrong path to DM_Wiatrak.CItem or this item was placed incorrectly and the fan on the floor of this map got broken. This small fix adds this item to the path where the map refers to.
Info:
In Painkiller v1.64, singleplayer maps search for map items in LScripts\Templates\Items and multiplayer maps in LScripts\Templates\ItemsMP. I added DM_Wiatrak.CItem and DM_Wiatrak.lua (that changes the fan speed) to this folder LScripts\Templates\ItemsMP. So the problem is basically in the LScripts.pak. You can also repack LScripts.pak with this fix if you like.
Alternatively, the map can be fixed by changing the path in: Data\Levels\DMPCF_Warehouse\CItem\DM_Wiatrak_001.CItem o.BaseObj = "../../../LScripts/Templates/Items/DM_Wiatrak.CItem"
Installation of the fix:
Copy the files to your Painkiller\ game directory, for example C:\Program Files\DreamCatcher\Painkiller\