[Nuke] setting up default parameter of nodes

I set up default parameter of some nodes so that I don't need to change parameter every time I create nodes.
For instance, I always set "method" of "VectorBlur" node to be "forward". By default, it's "backward".
If you write a little python code, you can actually change the default to be "forward".

Everything is explained in The Foundry's tutorial video below.
I'm not familiar with python very much though, it wasn't so difficult to set up:)