You can use the WordPress SMF Bridge Plugin to accomplish this. Please see the following link to the WordPress plugin site.
<a href="http://wordpress.org/extend/plugins/wp-smf-bridge/">SMF Bridge</a>
I have installed SMF. How do I connect it to WordPress Installation, so that way people don't have to have separate accounts? ( I think it is called Logging In Globally. If you log in "Here", you are automatically and simultaneously logged in "There" )