Without using the preview you can't get a note of the file number.
May I suggest too, that you select the option that keeps the camera
numbering when you change cards, so that you dont end up with a
hard drive full of DSCF0001 files!!
An alternative method of numbering is to use one of the options on
the EXIF viewer program. You can automatically renumber your files
to the date and time (to the second!!). This may give you a good
alternative method of logging your file to the subject. As long as
your watch and the camera are set to the same time, simply note the
time on your log next to each child. Then the two will match!
Haven't tried that - but it should work perfectly!!
Regards
David