Technically, ant socket 7 CPU will work in your laptop. Howver, either an AMD K6-2+ or K6-3+ would be best. These are low-power, cool-running processors that will be much more stable.
You will have to take the laptop apart which is explained in great detail here.
If you need any more specific info, feel free to ask moi.
P.S. I replied to your PM over at [H].