Thanbks, suzi_b. I had a little problem loading them at first - I got two versions, one working and one not, but I think the installation had put a Mac OS sub folder into my PSE Brushes folder. Same thing with the Watercolor Brushes I linked to. All's well now, once the Mac OSX folder had been deleted.
PSE6 on WinXP, Pentax K10d...... and now a Canon G10.