Taking Screenshots.

[DeeBye]

You could also use Fraps. It's meant for video capture during games, but it also does a wonderful job of capturing screenshots as well. It's a tiny utility that sits in your taskbar while you are playing your game.

From the website:

You can select the folder where Fraps will store all screenshots in. By default this folder is the same as the directory you installed Fraps into, but you can customise it to save anywhere on your disk. Click the Change button to select a new folder, or the View button to show the current contents of the folder.

The Screen Capture Hotkey lets you assign a button that will take a screenshot of the game screen. To change the Hotkey, click in the box and type a new key to be assigned this function. Clicking Disable will stop the Hotkey from having any effect.

Screenshots can be saved in Windows Bitmap (BMP), JPEG (JPG), or Portable Network Graphics (PNG) format.