First, welcome to Bladeforums.
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Second, unless that link you posted is the wrong one, I can't imagine a worse handle. The whole knife is crude and poorly made. That is not what you want to copy.
There are lots of ways to re-handle a knife. You could remove the scales and replace them with black canvas Micarta scales. They would be much more grippy, and the material can be worked with simple woodworking tools.
An easier choice would be to do a paracord braided wrap. You can tie and un-tie it until you get one you like. Once you have the wrap looking right, you can make it permanent by giving it a very light coat of epoxy resin. This will absorb into the cord and disappear, but the cord will become rock solid and firmly locked in place. If you search "Paracord Handle Wrap" and similar searches, you can find dozens of tutorials and styles. Paracord ( called 550 paracord)is cheap and comes in many colors.
Here is a tutorial from the site you liked for the other handle that will work easily on your knife:
http://www.instructables.com/id/Paracord-wrapping-a-knife-handle/
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