I wouldn't really suggest Fraps. Prt Scr gives you much more control over where the image is saved, format, etc. Fraps forces you to save it as a BMP, while it should be a JPEG for higher quality. Never did like Fraps.
Anyway, I would suggest the old fasioned way (as I do it) or Dxdll. Either one works perfectly. Combine that with camera.sqs, and you've got a perfect screenshot.
Just remember to toggle the crosshairs.