Here is a link to a website I use to obtain information on the mormans. This is not exactly what I wanted, but it gives insight on what they do, there is a good video there as well. Meanwhile I will continue to try and find the story of Smith making this ritual up.
http://1857massacre.com/MMM/lds_proxy_baptism_of_massacre_victims.htm
That is a good site. By far the best historical reference site is
www.utlm.org
also
Mormonoutreach.org is good as well