Hello there, and welcome to SMF!
The converter scripts converts the posts, members, topics from the phpfusion forum
, to a SMF forum. It does not do anything with articles or whatever else phpfusion has, in addition to the forum.
You could have phpfusion as frontpage and SMF as forum, but only if you work on their code, to integrate them, otherwise they won't work together automatically. There is no bridge that I know of, for now.
An alternative might be to take a look at a portal mod for SMF, the SMF forum can have a frontpage and many other CMS-like features through the use of portal mods. ( http://custom.simplemachines.org/mods/index.php?action=search;type=17