G60VX GPU Upgrade

Are there any GPU upgrades for an Asus G60VX-RBBX05 laptop? You can find the specifications of it >here<. I've already upgraded the processor to the Intel Core 2 Duo T9600 2.8 GHz and I've added an extra solid state hard drive.

I'm a bit worried about heating issues, too much watt consumption, and honestly I have no clue about upgrading GPU's in my laptop. It was fairly simple to replace the CPU in my laptop though, and I can tell the GPU is a chip that seems easy enough to un-clip and replace. The heat sink is easy to remove and I've replaced the thermal compound a few times now. I'm just not sure which graphics cards are compatible. Like if the newer GTX 560M will be compatible rather than the GTX 260M, or even the GTX 460M.

 

Sorry for the double post. I'm not sure if this is the place I should be asking this type of question. Although in order to help out anyone who was trying to assist me, I found a screenshot of the back of my laptop with the case off. (Keep in mind this is not a photo of my exact laptop, just an image of the model, so the hard drives and stuff look a little different.) I went ahead and notated each component in the laptop, but there is one component I can not recognize, but I'm thinking it's my motherboard.

http://i296.photobucket.com/albums/mm183/DemonKilo/Backsideofmylaptop_zps9c009c03.jpg