Help nuke evo xtreme to mybb

I'm fairly novice at this.  I set up a board using nuke evo xtreme some time ago.  Wanting to upgrade to mybb, is there any way to merge data from my existing forum to a new mybb forum?

I've installed mybb.  And i've uploaded the merge files.  However, when it asks to select a module I'm not sure what to go with.  I read somewhere about using a phpbb2 module for merge but couldn't find anything like that. 

The current site is jrks.org and I would like to convert as much as possible to a mybb site.

Thanks in advance for any assistance you can provide.