Hi both,
Thanks so much for your responses... it's mostly working; however; I've done some tests around creating deltas between files as follows;
File 1 ->
userid, fname, sname, dob, license number
1, diar, cart, 12/12/12, 13324
17, mickey, mouse, 2/2/22, 22222
14, donald1, duck, 1/1/11...