Scanning is very easy. Instructions below will describe this process with all details.

1. Where to start

As you installed TwainImporter driver you can scan images from TIFF, PDF, BMP, JPG and other file formats as it would be hardware scanner.
Start your favorite scan application and select TwainImporter driver as it is shown on screenshot below

2. Starting scan

Initiate scanning from the application and TwainImporter configuration dialog will be shown
Specify folder to scan documents from and press "Scan" button.