I'm having trouble finding a way to do this and feel like I have read the same stuff twice and still no luck. I have seen posts about this but none with a resolution. If I have missed a post here on the same topic then I'm sorry for the redundancy!
Just point me to the one with the fix.

I have a funtioning phpBB2 site/database. (v2.0.11) I also have a running but new/clean php-nuke install. (v7.5)

What I could use help with is getting the data out of the phpBB2 site and in to the new one. (Users/posts)

The server is running as below:
OS is 2003 Server
Apache 2.x
PHP 5
MySQL 4.0.23

Thanks in Advance and cheers!
/dev