OK, i will show you how to take screen shot.
(this is my first instructble ^_)

Step 1: Firt You Need...

1.a photobucket account or you can just go to http://imageshack.us/
2.a paint program

Step 2: Ok Now...

find the prt sc sys rq button... ya i know never head of it but it is their!
look at the pictures for help

Step 3: Congrads!!!

you found the button!!! right?....it toke me and hour T_T well lets keep going next open your paint program. For most people its a jar with paint brushes in it look in your programs to find it.
after that all you have to do is preses past and wala! your pic appears!!!