Hi Alban,
I've not yet purchased the hardware, I wanted to learn as much as possible about the potential for success before investing, so I haven't tried any drivers yet.
The target is probably going to be a National Instrument Industrial Controller IC-3171:
http://www.ni.com/pdf/manuals/376361b.pdf
These are Intel Celeron 1.9 GHz WES7 systems, I'm told the image is very close to full Windows 7 Pro.
The device supports 2 native DisplayPort screens, I wish to add two more to make a total of four
portrait mode monitors, each showing a window generated by my own software. The Portrait Mode element is important, and I'm assuming I can configure this within the Windows settings for the DisplayLink devices, and once set it will remain configured as such?