The way that graphic works is that if you are gaming, it will automatically be using up ram to help render the graphics. So don't worry about the hypermemory ability, it really isn't anything special because all GPU's use system ram.
With regards to the plastic sheet over the screen, held by tape, that is there to further protect the screen. I do suggest that you keep it, pack up all the extra wrapping and stuff, put it back into the box, never know when you may need it. What I do with the sheet is take the tape and fold it over to the other side for all 4 corners and then make sure it don't bend, because the sheet of clear plastic is quite nice.