How do I use my built in camera

First I would check that it is enabled in the BIOS (should be pressing F2 at startup).

Also, this may depend on the operating system you are running.

Regardless, here is a pack of all of the drivers for Asus EEE 4G. You can download them here:

Asus EEE PC Driver Pack

Once you've downloaded the zip (it's a bit larger, well relatively large), extract it, run install_cmd and select start restore. You will then be asked to restart, and that should be it! Oh, it may give you a message warning about unsigned software being installed during setup, just acknowledge the popup and select continue.

Be sure to check the BIOS first though and if you have a keyboard shortcut, try to toggle that first using the fn button. Lastly, if you are not running Windows, get back to me because this would be very different.

Good luck!
EJ