The installer is now asking for the update CDROM:
[Linked Image from stackframe.org]

Enter the Menu, and select 'hpux_9.1.update.iso':
[Linked Image from stackframe.org]
[Linked Image from stackframe.org]

After that is done, the installer shows the main menu, press enter to select all filesets:
[Linked Image from stackframe.org]

Press Enter once again to confirm that you to install these filesets:
[Linked Image from stackframe.org]

And, 'y' to really install:
[Linked Image from stackframe.org]

And this is the final install screen. After it finishes install, it will reboot into HP-UX from hard disk.
[Linked Image from stackframe.org]

Have fun with HP-UX!