I will soon be working to convert an old phpbb fourm (2.0.6) to a new phpnuke portal site. I want to convert the database from phpbb to phpnuke. What do i need to look out for.

I havnt had a chance to look at the schema for phpbb in a while, however from memory it looks about the same.
table names are different, I noticed that, I'll have to edit the db file before I import it.

what i'm most worried about is users - since they are shared between phpbb and phpnuke.

I wont be too worried if i have to delete my (4) phpnuke users to import the db, but what has changed in the schema.

also, are there any other schema differences between the two pieces of software?