Gimps Uniform Resource Manager (GURM for short), is not that hard to set up.It just requires you to make a few new folders and edit one text file.

It is well worth it if you want to add brushes, gradients, scripts, and patterns to Gimp after it has been started.
You can also remove them before you shut down and that lets Gimp start just as fast the next time around.
This is the best way to do it i have found. (windows)
Create a new folder named GIMP in the C directory
In this new GIMP folder create 4 new folders named
Brushes
Scripts
Patterns
Gradients
In each of these folders you can create sub folders and GURM will see them.

Like in Brushes folder you can create new folders named splatter brushes - circle brushes - blood brushes - tree brushes and so on and add just those brushes to each new category sub folder.
Download the GURM install package and open the config file (ini)
Edit the paths to relate to where you created your new folders (you need only add the path to the main folder for each item) for instance you have no need to add the path to Brushes/splatter brushes.Just add the path to the Brushes folder and GURM will see the other sub folders automatically.
You only need to set it up once and every install after that will already be set up.

Provided you place the plug-in and ini file in the user directory folder gimp-2.6/plugins
The beauty is you can keep adding sub folders with new brush sets and there is no need to set the ini file again.
The filter rocks in my opinion.And it's well worth setting up one time.
I love how it works for me.