In that "wide piece of plastic" in the right speaker area, you'll see a hole that looks different from the rest. It is 5 down from the top and 6 over. When you know what I'm talking about, then you'll know you've got the right hole. Push lightly with a strong, thin tool, such as a screwdriver and slide the "wide piece of plastic" to the left at the same time. It will instantly pop off. Then, slide your keyboard toward the space where the wide piece of plastic was. Don't slide it too far, or you may disconnect the keyboard. About 1cm is good. After you feel the keyboard has released from its holding screw, gently lift it near the F7/F8 keys making sure not to pop the keys off. The keyboard will flex, so don't worry about that. Once the keyboard lifts, you fold it over the touchpad and expose the area underneath. In that area, you'll see two screws holding down a square metal plate. Remove the screws (and the tape if you have a pre-assembled model) and the square piece of metal by inserting something in the gap at the bottom (touchpad side) of the plate. That side lifts up first. Then it completely removes showing you the two ram slots. Insert ram at a slight angle, push into place, then press down to lock it. When finished, do everything you've done in reverse, taking care to press the left and right sides of the keyboard after you've reinserted it to push it under the top cover, and don't use a screwdriver when replacing the "wide piece of plastic" as it will just slide into place and lock if inserted correctly (or incorrectly for that matter).
Good luck!
