The installer is now asking for the update CDROM:
Enter the Menu, and select 'hpux_9.1.update.iso':
After that is done, the installer shows the main menu, press enter to select all filesets:
Press Enter once again to confirm that you to install these filesets:
And, 'y' to really install:
And this is the final install screen. After it finishes install, it will reboot into HP-UX from hard disk.
Have fun with HP-UX!