Hi Bruce,
Please follow these links to get the dataset:
http://www.humyo.com/7891739/C1_orig.tar.gz
http://www.humyo.com/7891739/C1_modified.tar.gz
The first one is the original before placing the control points, the second is the modified dataset after correction.
Thanks a lot, and sorry for writing parallel with Gabor on this topic. Actually we are working next to each other, and whoever notices your mail first, writes the reply. :)
cheers
Gergely Orsi