convert from a phpbb-based database
 

im going to replace my phpbb-based forum (orion) with one from vbulletin. so before ill buy the license id like to know if theres a simple conversion script to get my outdated phpbb 2.x database to a fresh install of vbulletin 4.0

i know theres a bunch of tables which will not be converted since theres no congruent or even compatible feature in vbulletin - calendar, downloads, albums and so on (*). but im not going to miss any of my forums, posts and user so there has to be an converter from phpbb to vbulletin. is there one?

(*) additionally i have to offer my users those "basic" functions, although im obviously going to loose any actual data. but are there some usefull scripts to add those functions?

thanks for your answers

regards