Now that I downloaded 4.0.2 CD ...

4.0.2 works from CD-ROM. So I tried using the ISO from hard drive, the way I did for 3.8.2 above.

I copied the linux, memtest, and minirt.gz files from the CD, put them in a boot folder, and changed the grub menu.lst to point to the new files and new ISO. But upon boot, it really hated it. I did not see a minirt_ntsf.gz file on 4.0.2.

So I tried booting the 4.0.2 ISO from the files that I had been using for 3.8.2. I didn't expect this to work, and indeed the Linux loader complained mightily about some missing module. Nevertheless, when it had finished complaining, I eventually arrived at the Knoppix desktop (using my previously-saved 3.8.2 config) and was able to launch Firefox (off-line). I did not attempt anything else.

I assume that the boot files need to be specially arranged for 4.0.2. ?