CPU Upgrade for HP dv6000 (Intel)

My father has a HP dv6000 laptop, but constantly complains about how slow it is and how he cannot do anything efficiently on it. His birthday is coming up shortly, and I was thinking about upgrading his laptop as a surprise for him.

I've been searching (perhaps in the wrong places with incorrect queries) to figure out the proper chipset so I can perform said upgrade. However, I haven't had much luck.

Currently, this is the only information I have to go off of:

HP dv6000 (GB114AV)
p/n RX942AV

Specs:
Intel Celeron M 520 @ 1.60Ghz
1.00 GB DDR2
Vista 32-bit

I've been able to find the memory type that is supported (DDR2-667 (5300)) but haven't had any luck on the socket type. I'd like to get him a dual core processor but I'm worried about a few things.

What Intel processor will I be able to use?? Also, if I can upgrade to a dual core, will the overall system power draw be too great for the chipset? Currently, he doesn't take the laptop out of the house a lot, but I don't want to take away the mobility of a laptop from him.

Thanks for any help in advance.

You'd do well to listen to what Frozenlead said

You can drop almost any Micro-FCPGA dual in - however, whether it will work with your motherboard or not, I've no clue. Also, all the dual core mobile processors for this socket have a 35W TDP or above - the celeron has a 26W. It's likely the cooling system can't handle the heat. Replacing a notebook CPU is a chore, but by no means is it impossible. It just requires lots of dissassembly.

So long as you stick some name-brand modules in, they should work okay. g.skill is usually a good on the budget brand.