Acer Aspire TimelineU M5-481TG-6814 Ultrabook
In order to get the back of the keyboard off you need to open the screen after you have the front opened up, which will enable the rest of the keyboard to come up off of the laptop casing. Without opening the screen this will be very difficult to achieve.
*Another note: There are some small connectors that connect the keyboard to the laptop. You will want a small flat screw driver to pop the little tabs up on these cables to remove them so you can completely take the keyboard off.
(click on the pictures to enlarge them)
Note: if you are just installing ram and not replacing the hard drive then you do not need to disconnect the keyboard. The picture below shows the keyboard disconnected. The cables have small latches that release them and they pull out nice and easy. If it isn't coming out, you haven't undone the latch.
6.The small ribbon on top of the hard drive is attached by some stickyness and can be removed. Along with that are two small screws again holding the small metal mount to the hard drive. It bends easy so be careful with it. Make sure you have the right fitting screw driver for these two screws, as they are torqued pretty good and the head will strip if you don't.