Program the device using the code in the attached zip file. Note that this file has been updated from what I originally uploaded. There was a small problem with the original file (a pathname was wrong) that was easily fixable, but I wanted to make sure it was 100% correct as is. Also, this file is meant to be compiled with version 1.4.4 of the Vinculum toolchain. I am looking into what this is, but FTDI broke something in version 2.0.0 and this device no longer works. Here is the back door way of downloading this old version. Follow this link http://www.ftdichip.com/Firmware/vnc2toolchain/Vinculum%20II%20Installer%20V1.4.4.exe
Also, please note that a few users have reported problems with 64-bit Windows 7. I'm looking into this, but for the moment I have verified this to work on 32-bit Windows, and both 32-bit and 64-bit Linux without any issues. Speaking of Linux, if you are wanting to build this device to do forensics stuff under Linux, I would recommend you have a look at my instructable for The Deck
and in particular have a look at the 4Deck module. The 4Deck will allow you do do write blocker at high speed USB on your Linux system, while the write blocker described here only does full speed.