Mendel Leisk , Sep 28, 2009; 03:17 p.m.
Just my take: dealing with exposed film that's sat for 25-45 years you want to have a very close relationship with the processor, and it should be someone experienced in long overdue processing. It will very likely take adjustments to the usual process, maybe with test processing of a small portion of the film. It is not run-of-the mill.
I'm sure someone will be along with more specifics soon ;)