Whats the best way of doing this?

[Andy92]

Ok, what ive done is gone onto the admin cp and deleted all the forums with all the posts on, and also all the reputation.

Then to make sure just the reputation, posts and categories start from id 1 again, i have gone into PhpMyAdmin and basically emptied the threads, posts, forums and reputation tables.

Now they have all started from id 1 again, and everything is working!