Thank you Guys for all your answers. I will wait for Don's answer and then try out all suggestions and let you know the results.
Cassp-- I've checked the PSR tutorial but they haven't covered it yet as far as I can see.
Keybplayer- this is so great! Thank you. I am only using the vocal harmony to accompany me when I am playing my own songs. I have not tried out any smf midifiles with a harmony track yet. .....I don't think you can buy them here- the shops don't seem to know about them. Reguards. Jean.