Good morning Stewart.
The other day I transferred an old tape I have of my son and I talking, when he was 6 years old...the only such record that I now have (the ex having commandeered all our old video tapes), so pretty precious to me.
Anyway, I ended up using Windows Moviemaker, a programme that should already be on your PC...using the 'narration' option, and converted the track into both a WMA file and also an AVI file so I could upload to youtube.
I'm pretty certain on Moviemaker you can split (and certainly edit) the tracks.
Not sure whether that will be of any use to you.