How do I..
 

How do I import a previous Database to an entirely new forum? Old posts, registered users, styles, plugins etc.

I've been trying for many hours now but just can't seem to figure it out.

Any help is GREATLY appreciated. Thank you.

First dump the db via mysqldump and import it using mysql from the command line.
mysqldump --opt -u -p dnname > /path/to/dumped/sql file
mysql -u -p newdbname < /path/to/dumped/sql file

Copy over the forum files to the new sites forum directory.

Alrighty I figured it out.

Thanks for your help :)