the nVidia dds plug-in does work on 64bit systems. I run Win7 64bit. You just have to setup Photoshop differently. You have to install the 64bit and 32bit versions of photoshop. Then you have to edit the registry to point everything to the 32bit version of photoshop. Then you can install the nVidia dds plug-in. It's not shaky either - works perfectly for me
