Previously, I was able to install the adaptive agent during the last part of sysprep successfully with many test runs. Now, recently, it stopped working.

It looks like it dies during the Novell CASA installation.
The error in the Event viewer is Installation Failure:......\CASA.msi, Error 1603
Which means fatal error during installation (explanation)

Nothing changed with the image so I don't know why it died all of a sudden.

On a separate note, on the GTK+ library for CASA, the link still leads to nowhere, I've downloaded the run-time for windows from a different site and now CASA crashes on load.