Auto deskew problems with microfilm republishing

We need the ability to either turn the auto deskew off or set deskew forward for some of the microfilm projects we're working on. Many of these consist of two sheets of paper shot side by side (duplex) but that are not being split apart for this project. The auto deskew gets confused by the lines of text at different angles and over compensates, often cropping text. Our current fix is to turn auto deskew off one page at a time. The following urls are examples of some of this work.

http://www.archive.org/details/lbi_memoir_collection_reel_1
http://www.archive.org/details/lbi_memoir_collection_reel_2
http://www.archive.org/details/lbi_memoir_collection_reel_3
http://www.archive.org/details/lbi_memoir_collection_reel_4
http://www.archive.org/details/lbi_memoir_collection_reel_5
http://www.archive.org/details/lbi_memoir_collection_reel_6
http://www.archive.org/details/lbi_memoir_collection_reel_7