I am using daves wordpress live search plugin, which is awesome:
WordPress › Dave's WordPress Live Search « WordPress Plugins
When the page first loads, I would like the livesearch to display all the posts on my site, (at the moment no results are displayed until you start typing)
There are a couple of posts that I’ve looked at for help, but I can’t work it out:
this one:
WordPress › Support » [Plugin: Dave's WordPress Live Search] Search current category-only?
and this one