Cheers Hawker. I think my problem was a jumbled up and incoherent account of 2 problems, one of which you've now solved by pointing out a school boy error.
problem 1 that Nandroid file was not being found was indeed due to the fact the file was in the wrong place!!
problem 2 the second mystery is the Nandroid file that was in the right place, but which philz is telling me the md5 ain't right, even though when I check it, it is! Perhaps it was just a corrupt back up file. I'll try again....