When you are buying a car seat, it is important to make sure that the car seat is installed properly. The installation process is very simple and can be done by anyone with basic tools. However, if you are not familiar with the installation process, it is best to ask a friend or family member to help you. To install a safety first car seat rear facing, first remove the old car seat from the vehicle. Next, cut the old car seat in half so that each half has two pieces. Place one of the new pieces over the top of the old piece and secure with screws. Finally, place the other piece over the top of both pieces and secure with screws. If you have any questions about this installation process, please do not hesitate to ask a friend or family member for help.