NUANCE OMNIPAGE PRO 6 - REFERENCE MANUAL FOR MACINTOSH Reference Manual page 16

You must reselect your scanner in the Chooser if you install or
remove a scanner's ADF support.
To select HP scanner options:
To use HP AccuPage (available with HP ScanJet Plus, II, III, and IV series
scanners), select the HP AccuPage extension in the Chooser. The Auto
Brightness with HP AccuPage and Manual Brightness options will become
available in the settings panel Scanner options. To use 3D OCR and/or
AnyPage options with a supported grayscale HP scanner, select the HP
Scan 2 extension in the Chooser. The Auto Brightness with AnyPage, 3D
OCR with AnyPage, and Manual Brightness options will become available
in the settings panel Scanner options.
Use the HP Scan 2 extension with older, non-grayscale HP scanners.
To select a scanner for Image Assistant:
If you want to be able to scan directly from within the Image Assistant
program, first install OmniPage Pro and select a scanner in the Apple
Chooser. Then select a scanner in Image Assistant:
1 Choose Scanner... in Image Assistant's Setup menu.
For a list of scanners supported by Image Assistant, see the
Release Notes.
2 Select your scanner in the dialog box that appears.
3 If your scanner name does not appear, choose ISIS scanner.
4 Select the SCSI ID of your scanner.
To identify your scanner's SCSI ID number, look on the back or
bottom of your scanner for your SCSI ID switch or use a SCSI
utility such as the SCSIProbe™ control panel.
Selecting Your Scanner
Installation 1-7