Also not included, if you click "append" when opening a brush set, it'll add those brushes to your current brush list instead of completely wiping out your brush list for the new set. This is great for working with multiple sets of brushes without having to keep switching them out. This might only apply to older version of PS though or the method of loading them since I've noticed CS6 just tends to add them on bottom depending how you load them (by clicking load, or by clicking the name in the drop down recent brushes thing.)