[Sussex] iso checksums

[John English]

From: "Vic" <lug at beer.org.uk>
>  The media check has been found to be sensitive to DMA settings under some 
> circumstances, leading to
> false negatives.

If they are false why do I need to modify the install at all?

> I can't guarantee this will solve your problem, but it is a remarkably
> simple thing to try, and has got a number of people over exactly the same
> hurdle...

I'll give it a try, I don't see it can hurt?