Fisrt open your programe and and image editer where you can copy and paste such as MS Paint now in the programe when you want to take a screenshot Just press "Prt Sc/SysRq" And minimize the programe and "paste" You should no see the whole screen in the image editer now save the image you now have a screenshot of your programe (You can repeat this, but the previous screen you "copied" will be rewriten.
Visit my website for more http://kevan.org/brain.cgi?QACKALACKDUCK