Quote from dronic on the 4th of August 2011:
There is version 0.58 of the COD4 Player out for quite a while. You can associate demo files with the tool under "Setup", where you also can add "promodlive211" in the top line to automatically start with Promod LIVE 2.11 EU; it is about the same as if you modify the start parameters of a desktop shortcut in Windows so that it looks more or less like this:
"D:\call of duty 4\iw3mp.exe" +set fs_game mods/promodlive211
This will directly start the game in Promod LIVE 2.11 EU.