I have recently setup a website on How to Digitally Archive and Share Historical Photographs, Documents, and Audio Recordings. The website includes a section with suggestions for planning and developing historical slide showshttp://archivehistory.jeksite.com/chapters/chapter8.htm
Another section has detailed guidance on using ProShow Producer and ProShow Gold for historical slide showshttp://archivehistory.jeksite.com/chapters/slideshow.htm
This may be useful to anyone new to using ProShow Producer or ProShow Gold, as well as to those developing an historical slide show.
There is also a legal chapter (http://archivehistory.jeksite.com/chapters/chapter9.htm
) that includes a section on slide shows.