Screencap of website

Hey, everyone. I'm trying to get a screencap of a website so I can use a pic, but for some reason it's not pasting into either my PSP or PS. I'm not quite sure if I'm doing it right, either. I use Windows XP. Can someone explain the process to me? I checked the memories, but it was all about capping movies. Thanks bunches!!!

EDIT: Figured it out. Does anyone know any other methods to cap a website?