Hi flip city, I'm sorry not to have responded to your query sooner.
It's possible to do what you want. I prefer scroogle's ssl version.
For the scroogle ssl search plugin, go to: http://incognu.com/smhax.xhtml
and look for the scroogle ssl searchplugin.
For about:config, this seems to work for me (going by what I have set in a 2.0 build):
filter for "keyword"
filter for "search"
browser.search.defaultengine engine:///<set to path to ssl-scroogle.src>
(it will be in your ~/.mozilla profile directory)