Settings file used by S.T.A.L.K.E.R., a first-person shooter game; contains parameters for game engine properties such as the physics model settings, graphics, and weapon characteristics; stored in a plain text format and sometimes "modded" to customize gameplay.
Players can also adjust game engine settings in the S.T.A.L.K.E.R. in-game console (press tilde "~" to activate it). These adjustments are saved to the User.ltx file, which is located in the game installation . However, it is recommended to backup the existing User.ltx file before making changes.
The User.ltx file is located in the following directories ("SHOC" stands for Shadow of Chernobyl and you should replace "SHOC" with "COP" for Call of Pripyat):
Windows XP: C:\Documents and Settings\All Users\Shared Documents\STALKER-SHOC\
Windows Vista/7: C:\Users\Public\Documents\STALKER-SHOC\