Ok so I downloaded the file and saved it to my desktop. From there I burnt it to CD using Nero. I did not have the option of making it a bootable disk, so just proceeded as a data disk.

In the BIOS, changed boot options to CD, but system booted straight into Windows.
Then I disabled the option to boot from HDD and rebooted.

This time I get the message "Boot from CD", but that's as far as it goes. Had to restore BIOS to get back to Windows.

I must be missing something simple.

Bill