Custom Paint Brushes are fun!  I'm going to add an angel custom set before I click on Custom brushes.  See how my brushes got numbered for me?  Starting at number 7, those are the custom brushes that come with PSP7 as shown below.  There are some really cool ones too!  If you add in a bunch of custom brushes, then want to clean up the brushes, see the section on Node Edit & Shapes Edit for removing the .jpc file in the Cache folder.