I assumed that you and Bullym0m uses WinXP.. Once you press the 'print screen' (PrtScn) key on keyboard then click 'Start' on left-bottom then 'All Programs' then click 'Accessories' and finally click 'Paint'.
Paint program will pop up and show the white blank picture. Click 'Edit' then click 'Paste. Voila, you will see the picture that you copied with 'Print Screen' key.
One more thing to go... Click 'File' > 'Save as' > You can name the file name whatever you want. Once you did, change '24-bits Bitmap' to 'JPEG' and click 'Save' button. You are all done! Upload/Attach it and show us.
If you have any questions, ask away.