If you overwrite legitimate game files and later try to go online (even on private servers), anti-cheat systems like Valve Anti-Cheat (VAC), PunkBuster, or EvenBalance may flag your modified executables and issue a permanent ban.
in the root of the cod folder.
Description:
Simplify manual mod installation by automatically placing required files (cod-sp.exe, clientdll.dll, and table.aslr) into the root Call of Duty folder. If you overwrite legitimate game files and later
clientdll.dll is a dynamic link library used by the game’s client (single-player or multiplayer) to manage network replication, player actions, and game logic. In legitimate installations, this file is named something like iw3sp.dll or cgamex86.dll depending on the title.
When a pirate or modder refers to clientdll.dll, they are usually talking about a modified DLL that: in the root of the cod folder
In some cases, modified clientdll.dll files are used to bypass ASLR (more on that below).
By placing the modified clientdll.dll in the root folder, you ensure that the custom cod-sp.exe loads this specific file before it looks for the original, unmodified version located elsewhere (or verifies the original's integrity). In some cases, modified clientdll
If the modified .exe is programmed to look for clientdll.dll in its own directory, it effectively performs a DLL Hijacking technique (in a benign, modding context). It loads the custom code, reads the offsets from table.aslr, and initializes the mod.