hi guys. someone has asked me to add some memory to an asus laptop. i cannot see how easily.i've taken the cpu/memory compartment cover off and cannot see the memory at all apparently there should be one module installed and one free slot. the manual says upgrades must be done by an approved retailer or repairer but i would have thought it easy to d.i.y. model is asus A2500H.does anyone know how to find/upgrade the memory on this model?