Hi John,
Have you seen that the Morman church have some Salzgitter films. You can search the catalogue either by 'keyword' or 'place' on this webpage:-
http://www.familysearch.org/Eng/Library/FHLC/frameset_fhlc.asp The website gives details of nearest Morman Family History Centres.
The church archive below holds copies of the Salzgitter area church books.
Ev.- Luth. Landeskirche in Braunschweig
Landeskirchliches Archiv
Ditrich-Bonhoeffer-Str. 1, 38300 Wolfenb�ttel
Postfach 1664, 38286 Wolfenb�ttel
Tel. 05331/802-197, Fax 05331/802-710
E-Mail: archiv@luth-braunschweig.de
Web: www.luth-braunschweig.de
Happy Hunting,
Rena in England