2 gigs of RAM - 3?

Hi all,
I just bought a MacBook Pro 15-inch (the lowest-end model) with 2 gigs of RAM. I'm planning on purchasing an OEM copy of XP and VMWare Fusion so I can run XP on it, and I think I should purchase more memory in order to do this. I only really need 3 gigs as far as I can tell, and right now I have a 1-gig stick in each of my two memory slots. My question is this: can I take one of the 1-gig sticks and put it in the slot next to the other 1-gig to "create" a 2-gig stick? Or do I have to go buy a 2-gig stick?

Not 100% sure I understand what you're asking, but each slot can only hold 1 memory stick. So to get to 3 Gig you'll need to remove 1 of your 1 Gig sticks and replace it with a 2 Gig. Other World Computing makes a big deal of matched pairs for memory upgrades, I'm not sure if there is a reason to be concerned about matching or not, maybe someone else can comment on that.
Looks like you can go from 2 to 3 Gig for about $50 plus shipping, or from 2 to 4 Gig (replace both existing sticks) for about $100 plus shipping. For Example;
[To get to 3 Gig|http://eshop.macsales.com/item/Other%20World%20Computing/5300DDR2S2GB>
[To get to 4 Gig|http://eshop.macsales.com/item/Other%20World%20Computing/53IM2DDR4GBK>
For 1 virtual machine you can probably get away with 3 Gig (depending on what MacOS applications you'll also be running). I'm typically running 2 VMs at the same time plus an assortment of MacOS apps, so am glad that I have the 4 Gig.

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