Making Knots with Gimp's Path Tool.
I may make another, but I think I pretty much covered everything you need to know to make this style of knots.
Let me know if you find this tutorial useful or confusing. Any questions, comments, or critiques are welcome.
The end result of the knot can be seen here: [link]
And if you are looking for a similar tutorial for Inkscape you can find it here: [link]