I have been trying out some free panorama software, each one has its way of getting the pictures joined together satifactoraly.
Panorama Perfect - program for creating panoramic photos
AutoStitch
Auto stitch does it all for you, but it is time limited offer.
hugin - Panorama Tools GUI
It wasn't long ago when I downloaded Panorama Perfect light v 1.6 and that seems to be difficult to find now. But, I am still searching and it isn't on there manufacturers web site.
Anyway, plenty to play with here. Would like to hear if I have missed any or if you have any information.
Tony_photoplus