I went and bought the Vista - General icon bundle from IconShock.com I haven't had time to go and replace the icons for PainlessSVN yet. The download was huge! It was over 400 megs. I was pleasantly surprised about finding graphics in PNG, ICO, GIF, and BMP formats. I guess I was just expecting only ICO formats.
Unfortunately, one of my servers died and I've been busy spreading the contents of its hard drive across the other servers in my network. That and an increased amount of projects at work has been keeping me busy and away from finishing PainlessSVN. I'll just keep plucking along.