>>> Does disk-1 have bootdisk/ and rootdisks/ directories in it? The ISO
>>> I downloaded doesn't.
>>
>> They are on the 3-rd disk
>
> I guess, then, I will have to use the the boot- and root-diskettes
> from the 10.0 ISO to kick-start the installation setup.

Look at isolinux/sbootmgr/ on the first CD if your computer's BIOS can't
boot from a CD. There's also a README.txt file there.

--
damjan