Before you can upgrade your video card you need to carry out the instructions in this topic:
Getting under the hood of your X1000 w/ picsFor a list of currently available video cards, check
HP PartSurferOk, once you finished dissassembling the case, you can:
Remove the heat shield:- Remove one L15 screw
- Remove one L3 (small thread pitch)
- Pull up on heat shield until the tab snaps upward past the PC Board

Once you have removed the heat shield. You can:
Remove the video card:- Use fingers to pull modem off and set aside
- Use mounting boss from modem as a leverage point to pry off video card as shown.

Installation is the reverse of removal but make sure that thermal pads on the heat shield seat well against their respective chips.
Here are some random video related pics:




Maybe these pics can help someone determine if we have aftermarket upgrade options?
-Dan