hey uncle al
It should only require one hand, spread the plastic clips on both ends of the slot, then insert the new stick. Wiggle it to make sure it fell in the slot and then press down on one end and then the other, the clips should fully lock in (automatically) if not then press a little more and pull the clip in by hand. If the new memory stick has a heat spreader on it you should not put pressure with your hand on the heat spreader, that can dislodge the heatspreader from the chips. Instead use a brand new pencil thats never been sharpened and use that to press the memory stick in place at the ends of the memory stick where it should be circuit board and not heat spreader.