We are looking at Installing 2 VM Server hosts at a school I support in London and have been trying setup a test environment, but I am falling at the first hurdle. I have downloaded and burnt multiple versions of the .ISO installer, but each time I try and use them to install the host environment I get the following error:

I have checked the ISOLinux.cfg file and this is empty, which surprised me, but I've checked all of the .ISO files that I've downloaded from Oracle ( Multiple versions of VM Server ) and they all appear to have ISOLinux.cfg files that are blank.
Tearing my hair out with this one, so any help would be greatly appreciated.
David