Last June JUNL opened to the public a digitized version of the "Mahzor Nuremberg", from the collection of Dr. David and Jemima Jeselsohn at: http://jnul.huji.ac.il/dl/mss-pr/mahzor-nuremberg/ 

This site has now been enhanced with a detailed Hebrew study of the texts of the mahzor by Jonah and Avraham Fraenkel: "Tefilah u-fiyut be-mahzor Nirnberg" (Prayer and Piyyut in the Mahzor Nuremberg) This 139 page study is freely accessible as a pdf file at the Mahzor site under the 'About the Ms.' [mevo'ot] section, or directly at: http://jnul.huji.ac.il/dl/mss-pr/mahzor-nuremberg/pdf/fraenkel_j_a.pdf

The Digital Repository of the Jewish National & University Library can be found at: http://www.jnul.huji.ac.il/eng/digibook.html