Ok, so I am wanting to upgrade the RAM on my laptop. I have a Compaq Presario V6000. I've had it for a little over 4 years, and it still has the stock 1 GM RAM. I want to upgrade to a 2 GB RAM so is there a certain RAM stick I need to buy or will any work. Also, my computer has two half gig sticks in it so do I need to get two 1 GM or will a single 2 GB work?