Joomlahacks is not the only one with an SMF bridge. I have never used this one but you may have better luck with it:http://extensions.joomla.org/component/option,com_mtree/task,viewlink/link_id,1094/Itemid,35/
As far as a tutorial I am sorry but those sites are going to be able to help you better as they are the ones that wrote the bridge. Basically all you are doing is setting up SMF on your server by itself simple machine's website is full of information on how to setup SMF. Then just install the bridge into Joomla and it will ask you what information you would like to sync.
Hope that answers your questions.