[Solved]How to install drivers for multi-graphic card laptop

Could anybody help me
install drivers for a multi-graphic card laptop (Asus N10JC – it has Win7 Ultimate)
it has both internal and external 256MB Graphic card
but I can’t seem to get it to work.
it says the driver for the external one is installed but it has choppy playback for all m-720p movies and even 480p youtube videos. it also has a manual switch to switch between them. thanks guys in advance
Thank you FBI for your advice – it works now, I just have to switch the switch and reboot and it changes the graphic card. It’s good that I can now connect it to the HDTV (1280×720) and play youtube videos, or m720p encoded movies (those full 720p movies or 720p videos from my camera are still choppy though – but it’s only a small netbook afterall thanks again for help Meerkat
Answer #1
Install in this order.
1. Intel Graphics Media Accelerator Driver for 945G
2. Nvidia Graphics Driver
I would reboot between each one.