Call of Duty 4: Screenshots
To make a screenshot in-game, simply press F12 or 'Prt Scr' at the place you like in your map. It's also best to use the '/exec minimap' command in the console, to get rid of the HUD elements. If you pressed F12 the screenshot will be located in '[root]/main/screenshots/' (or '[root]/Mods/[modname]/screenshots/' if you used a mod while taking a screenshot (awe4 for example)). If you pressed Prt Scr it's simply in memory and can be released by pressing 'Ctrl + V' (once your in an image editting software).