go to their site
http://www.spellchecker.net
then,
You have to sign up but it's free...
they send you an id then you download a javascript and a couple cgi files from a .zip file and there's about three steps...
the only templates you change are the newthread and newreply (and the edit post one if you wish)
go to there support page within the site itself for details...our users love it already - and it's fast