[chrishajer]

I think the most likely route is to find something that will convert SMF to phpBB format, then import that to bbPress. I think the most work has been done there, on a phpBB importer. If you search this forum for phpBB or SMF you will see some previous discussion. Here’s one thread:

https://bbpress.org/forums/topic/import-smf-to-bbpress?replies=20#post-4541