Actually, it might not be that easy, when I did some work on trying to develop a "move post" feature, I found out that you have to be very carefull with the posts, otherwise all replies will be "lost", i.e. not showing any more, even though they are still in the database. I think that's why Scream has it set up that when you delete a post, and there are replies, the post doesn't really get deleted, but replaced with something saying "post deleted by...", only if there are no replies to a post, it is safe to remove it from the database, as far as I remember, so I would use great caution with this mySQL command.
