You might get more information about East Preston on the Sussex Family
History Group web site http://www.sfhg.org.uk/
and for people searching they now have an online Data Archive, see bottom
centre of Home page. This is free for members and pay to view for those who
are not. It is an ongoing project and mostly baptisms are on at the moment,
though East Preston has still to be done. All Sussex marriages are on their
CD so not on the site. A search on Steer including middle names brings up
over three thousand hits!
There is also the Rootsweb Sussex-Plus and for SFHG members their own
Rootsweb mailing list though you can search and view their archives.