32bit Photoshop CS4, CS5 or CS6 on Windows

Make sure you install these in the plug-ins folder of your 32bit Photoshop. Usually that is this folder:

C:\Program Files (x86)\Adobe\Adobe Photoshop CS4\Plug-ins

Substitute CS4 with your appropriate version of Photoshop.

Download Links

MultiFill Windows 32-bit (Free)

Flatten Pro Windows 32-bit