I found another free one that is more detailed with layers and such -
http://download.cnet.com/Artweaver/3...-10525595.html

[Artweaver

Artweaver is a Windows Freeware program to simulate natural brush tools. It is therefore suitable to leave your creativity free run. Artweaver offers you a clear program window, which can be used without training immediately. ]
http://www.artweaver.de/index.php?id=59,141,0,0,1,0