Hi, I have an older 17inch MacBook Pro. I believe it's model 2,1. It's 2.33 and came with 2 Gigs of Ram. My understanding is that while 2 Gig's is Apples maximum, it can actually go up to 3 Gigs in memory. I guess I could just add a 2 gig chip and end up with that and a 1 gig chip. But if I bumped it up to 4 gigs, if Snow Leopard would recognize and use all 4 gigs? Or maybe the limit is hardware based.... Any information or advice would be appreciated. Thanks!