If you are running a test game you can press the PrintScreen button to take a picture.Then you can end the test game,open up your paint program,paste the pic into it and save it as a .jpg image.
If you are running a built game you can press F12 to take screenshots and you can take as many as you like.They will be in The Game Creators\FPS Creator\Mygames\whatever the name of your game is folder in .bmp format.You would need to change the pics to .jpg before you posted them.
FLa
Where you can find my demo:http://www.savefile.com/files/6970524