Upgrading my video card on my compaq evo n610c laptop?

hi ive got a compaq evo n610c and i am wanting to play battlefield 2 and i dont have the right video card and im wondering if i can upgrade my ATI MOBILITY RADEON 7500 AGP (0x4C57) to the 100% DirectX 9 compatible 128MB Direct3D Card (GeForce FX 5700+/Radeon 8500, 9500+) so im just wondering if i can upgrade it because i wanna play my game????