I changed all the ViewSonic VA903 .inf and .icm file names and text from 903 to 912, and it is working great with Windows 7 Ultimate. The original VA903b files came from the ViewSonic VA903b install disk.
The following files are found inside the driver download file.
|VA912_SERIES.icm||512 bytes||4 Feb 2009|
|VA912_SERIES.inf||1.3 KB||29 Dec 2014|