So, if my MP has the stock 1gb and I add a 2gb kit (2x1gb), I don't have to take the original 1gb out, right? I thought not, but this dude I know insisted I'd have to, I guess cause he thought I'd have to have sticks of all the same capacity. Any truth to this? I hope not. I'd like to have 3gb via 2x512mb and 2x1gb.