2.) Once you have the screen you want to capture, hold down the IPhone home button. While you continue to hold down the home button, press the on/off button on the top right of the IPhone. You will hear a sound and the screen will flash while the screenshot is being taken.
3.) To view your new screenshot that you just took, open the Photo Album application on your IPhone and then go to the Camera Roll.
4.) In order to get your screenshot off of your IPhone, you will need to sync your IPhone with the photo application of your choice that syncs with your IPhone or if you are a Mac user you can sync your IPhone with IPhoto.