*disclaimer: this method is from the Z71v, but it should be close*
There should be two screws on the bottom of the notebook marked "K". Unscrew them, then flip the notebook back right-side up and open the lid. If you look along the upper edge of the keyboard, you should see three small tabs (mine are above the F1, F8, and Ins keys). Use a small flathead screwdriver to pop the keyboard above those tabs and then you should be able to take it out of its spot and access the memory slot. When you're finished installing the memory, just put the keyboard back, snap the tabs in place, screw in the K screws and you're done!