If you do find yourself in need of this guide, please be kind and donate a little via paypal to him. He's worth it.
The left hinge on the HP notebook computer that the boys use (John's old one) has been broken for a long time. I finally ordered a hinge from an Ebay seller with plans to fix it. John and I made time for it yesterday, and we're so glad we did. It was so easy thanks to these fabulous instructions.