Symptom:
In AIX 5.1 smit reports an error indicating that the image is not recognized. Also, subsequent driver install attempts may require the driver image be placed in a separate directory from the first attempt and the inutoc command run.
Solution:
Prior to smit installation run the following command from the AIX root prompt:
inutoc (directory_path_where_driver_image_is_located)
Now proceed with the installation using smit.