After buying this pocket knife I found out it's also sold serrated. Instead of returning it I added the serrations myself. For doing it by hand I think it turned out well. All you need is a dremel tool, or something similar, and some diamond bits.
Step 1: Mark out your pattern
Start out by marking where the center or each serration will be. Make sure to extend the mark just a little past the bevel of the blade. I did one mark every 1/8".