Convert Netbook Keyboard to USB Keyboard

converting the matrix would be to hard in a way.

unless the keyboard is native usb already ,

So sorry to reply to such an old post, but I may have come up with a solution.
I have yet to try this, as I don't have the parts necessary, but i am planning on giving it a go some time.

You will need:
The circuit from a USB keyboard (make sure you have the silicone cap that holds the ribbon cable in place)
Old laptop / netbook keyboard
(If required) an adapter to connect the ribbon cable (the pins on the keyboard will usually be the same amount as there is on the circuit, the ribbon cable is just really small)

1. (If required) attach the ribbon cable adapter to the ribbon cable of the keyboard.
2. Line up the pins of the ribbon cable with the keyboard circuit.
3. Place the silicone cap over the ribbon cable and pop it into place.
4. Plug in the keyboard to a USB slot on your computer and test if all the buttons work.
5. If some of the keys are wrong, use a program to rebind them (I don't know of any such program but I'm sure one exists)