A note on the context of this document
This is the international version of an article published on the German ColorNeg web site. Some navigational elements will therefore take you to pages that are in German. Menu entries you do understand will usually take you to other English pages though. You're quite welcome to look around. You can always use your browser's back button should you go astray. Finally you may want to go to the international ColorNeg web site.
Building a driver for Nikon Scan 4.03 under Windows 7 64-Bit / Windows Vista 64-Bit
Even though Nikon does not officially support 64-Bit Windows versions Nikon Scan 4.03 can still be used under such operating systems. We will detail how that can be accomplished below. Please note that you are using this information at your own risk and that we can't provide support for this. Of course that doesn't mean we'll not answer questions or are not interested in any problems you might encounter. This page is based on a Photo.net thread started by the community member Steel Chn whom we thank for this information. We mainly summarized that thread for our German users but to keep things in synch below is an English version also.
To get started download Nikon Scan 4.03 for Windows Vista 32-Bit. Install the software on your 64-Bit Windows System. Next we need to create a driver for your scanner that is 64-Bit compatible. To do so create a new folder anywhere on your System you feel comfortable with and copy the two files "NKScnUSD.dll" and "Nks1394.inf" which are to be found under "C:\Program Files (x86)\Common Files\Nikon\Driver\Scan1394" into that folder. Open "Nks1394.inf" in a text editor of your choice to replace its contents. To do so click into the text box below and press ctrl+A followed by ctrl+C to copy the code. Next enter your text editor and press ctrl+A followed by ctrl+V to paste the code into the *.inf file.
Save the file. Turn on your scanner and connect it to your computer. Go to Window's Control Panel and select System / Device Manager. In the device list your scanner is located in the imaging devices category. The corresponding entry will be named "Firewire Scanner" or something like that. Right click this entry and select "Update Driver Software". Next select "Browse My Computer" and specify the folder you created before. A warning message will be displayed which you will need to disregard, telling the system to go on with the installation. Afterwards your scanner should be listed under its correct name like "Nikon SUPER COOLSCAN 8000 ED". When you start Nikon Scan 4.03 after doing this it will detect your scanner and you should be good to go.
This will let you use Nikon Scan 4.03 under all Windows 7 and Windows Vista 64-Bit versions with the following Scanners: Nikon Super Coolscan LS-4000 ED, Nikon Super Coolscan LS-5000 ED, Nikon Super Coolscan LS-8000 ED, Nikon Super Coolscan LS-9000 ED, Nikon Coolscan IV (LS-40) and Nikon Coolscan V (LS-50).

