G73jh GPU Upgrade?

I've gained some confidence after opening up my laptop several times and replacing things. So now I'm thinking perhaps I can upgrade the GPU from the 5870m

I've read a couple posts of people doing this but each involving different processes. For example, I saw one topic just replacing it and another talking about modding the vbios or something.

What I want to do is replace my 5870m with something better that isn't too expensive and without making things too complicated. If I can just...

G73jh GPU Upgrade?

G73jh GPU Upgrade?