How can I organise/re-arrange the list of brushes PS CS6?

[AceCo55]

I'm  not even sure what to call the thing I'm trying to organise!

When you want to load a new set of brushes and you click the "gear" icon in the brushes picker (?), you get a list of brush names (if you select one of these it contains a number of brushes that you can then use). See the screenshot below - the lists are inside the red boxes.
What I would like to do is rearrange that list of brush sets and add separators to that list.

Is it possible and if so can you point me in the right direction - all my searching so far just relates to rearranging brushes within one of those brush names.

Thank you for any help you might be able to provide.

[Trevor.Dennis · Accepted solution]

What operating system?

If Windows, you'll find the brushes here:

C:\Users\[User name]\AppData\Roaming\Adobe\Adobe Photoshop CS6\Presets\Brushes

Just rename the .abr files so they appear with meaningful names in alphabetical order.  I've been doing this for as long as I can remember.  I try to leave enough of the original name to identify the set, but obviously at the end of the file name.

Other windows and Mac file locations can be found here:

Photoshop preference file functions, names, locations

Note: with Windows you'll need to make Hidden Files & Folders viewable.

[Trevor.Dennis]

Reading your question again, it is not possible to split up the list as you ask.  In fact you are better off than CC version users because your list displays in multiple columns so you can see them all at once.  Adobe changed that a few versions back, because they thought that people with a very large collection of brushes could not easily scroll to the off-screen sets.  The current method is a PITA and takes ages to scroll through, but brush management is  much better now (not everyone would agree with that to be fair) but it is easy to rationalize your brush groups dragging the best presets into one category group, and deleting the debris.   There are a lot of duplicate presets from different users out there, so someone is stealing other people's work. 

It is also much easier to make presets with tool settings and even colour now.  I hope that more improvements are coming, and maybe we can convince you to update. 

[AceCo55]

Thank you Trevor - very much appreciated. At least I know what is and isn't possible.
Your suggestion about renaming is something I CAN work with to achieve a close enough solution.
Many thanks for taking the time to answer my query.