i would like to answer you question for ya but i don't know much on laptop's
I'm Sorry but there is a whole community here to help you
got a good laugh on that craptop rather than laptop lol
i'm sure if you get ( example ) two kits of 2x4gb=8gb kits and they have the same amount of gb / cas latency & timings there would be a 50 percent chance of them working together. but i am not sure of mixing 2gb & 4gb to get 6gb total it may or may not work there may be some sort of chance to play with i'd say