I had a quick try at them as well. Didn't go too well either.
I found a spectra of alpha grus I took some time ago, and it seems the deep absorption line is H beta (4830A if I remember). I do recall sort of giving up trying to process the spectra as it seemed "a bit odd".
I am happy to be proven wrong, but I always thought ccd's couldn't capture UV wavelengths.
cheers
Mark