Installation:

Download and extract the zip file.

Impressionist Accessories (folder)
Impressionist.8bf
MSVCRT10.DLL
plugin.dll
Readme.txt


The folder "Impressionist Accessories" go here:
(C:\Program Files\Adobe\Adobe Photoshop CS3\Plug-Ins\Impressionist
Accessories) Note: In the above example I'm using Photoshop CS3 your version may be different.

The file " Impressionist.8bf " must go here:
(C:\Program Files\Adobe\Adobe Photoshop CS3\Plug-Ins\Impressionist.8bf)
Not in the Impressionist Accessories folder.

There can only be one Impressionist.8bf in the plug-in folder. If you
have one Impressionist.8bf in the Impressionist Accessories folder it
will cause problems.
Note: You may need to copy these two DLL files (MSVCRT10.DLL and plugin.dll) to C:/Windows/System in order for some filters to work.