Open Office will convert a document into a PDF. Open the PDF and do a screen capture.
Or just open the Word Perfect document and do a screen capture. It's built into Windows software. Mac might be Print Screen, but you have to have the entire document on the screen to capture.
Free For Windows:
http://download.cnet.com/MWSnap/3000-2072_4-10524229.html Will capture whatever you surround or whole screen. SAVE by clicking on the little disc icon. Done!
Optional, Screen Capture, do a Copy Control+C, and open any image software, and use Control+V for Paste. Save As (name) You now have a JPG.
Does that do it for you? Or do you want more ways?
You didn't say what OS or what kind of computer.