Hi there Stuarty, for backup purposes i would try this
DVD Shrink
i think it's not bad. RTFM as usual
just one thing, you should be able to download this without leaving any email addresses etc, the link above is asking for info from you. Just look about till you find a site that does not ask for user info.
I found the version i have used from a Japanese website, was a bit difficult as i do not read Japanese.