Thanks so much for your response..... I am working on the problem as well, but I thought I'd post the source code for the Vizic libraries (as well as a small example) so that you can have a look.
Here is the code for SMARTGPU.cpp... http://www.sonoratechnical.com/files/SMARTGPU.cpp
Here is the code for SMARTGPU.h...http://www.sonoratechnical.com/files/SMARTGPU.h
Here is the sample sketch: lines.inohttp://www.sonoratechnical.com/files/lines.ino
I'm working on it as well. I'm completely new to Arduino.. (I suspect I will need to follow similar mods with the SMARTWAV product as well). If I stumble too long, then I'll get a 4X20LCD and use the libraries that many you have already adapted to the DUE.