squirrel,
I do really love your red flower painting!
It's going to be so much fun watching to see what you do with David's Suminagashi brushes, and I'm glad you haven't made us wait too long to see the first few.
squirrel and Ann,
David's Suminagashi brush library can be installed in all Painter versions, from Painter 7 through Painter X.1
If you want to install the brush library in multiple versions, it will be quickest, easiest, and cause fewer problems if each time you install from the extracted ZIP file (rather than copying and pasting from one Painter version installation location to another Painter version installation location).
Ann,
Before attempting to install the Suminagashi brush library, sure to read my installation instructions in the suminagashi brushes thread. It'll save you time and frustration.