Used Registar to overlay all your images onto a WF of A Crux plus the Star Atlas Pro map.
Larger version here 700k
http://www.members.optusnet.com.au/~avandonk1/map02.jpg
Registar had no problem with the Star Atlas Pro map. I must get it now.
The overlay is most informative, with one look you can see what all the scales are.
Bert