Dont know if its much help, but maybe something is. This is some directions:
"Cod4 folder for vista and windows 7 C:\Users\username\AppData\Local\VirtualS
tore\Program Files\Activision\Call of Duty 4 - Modern Warfare Cod4 folder for windows xp c:\users\username\program files\activision\call of duty 4 - modern warfare Cod4 folder for steam users (use this only if you bought the game off of steam) 32- bit: C:\Program Files\Steam\SteamApps\common\call of duty 4 64- bit: C:\Program Files (x86)\Steam\SteamApps\common\call of duty 4 _____________________________________________________________ Demo locations- If you recorded the demo in any type of mod, go into your mods folder and find the mod you were playing whilst recording. in that mod's folder there will be a subfolder called 'demos' and that is where your demo will be located. say i recorded a demo in promodlive204... on windows 7 or vista C:\Users\username\AppData\Local\VirtualStore\Program Files\Activision\Call of Duty 4 - Modern Warfare\Mods\promodlive204\demos say i recorded a demo in promodlive204... on windows xp C:\Users\username\program files\activision\Call of duty 4 - modern warfare\mods\promodlive204\demos Steam users 32- bit: C:\Program Files\Steam\SteamApps\common\call of duty 4\Mods\promodlive204\demos 64- bit: C:\Program Files (x86)\Steam\SteamApps\common\call of duty 4\Mods\promodlive204\demos Movie Making (fraps, cod4player, moviemod mod, moviemod profile"
Or, http://forums.bf2s.com/viewtopic.php?id=119672