Here I have seen one of the advantages of the script and therefore do not need to create a 404 error page. I mean my forum is growing so that it has a section dedicated to Europe, but with many posts in the UK, what have I done?. I created a new forum in the UK crossing all posts he held in the Europa Forum in the UK with messages to the new Forum in the UK. The incredible thing that I put the old urls and redirect me to these new, does not appear error page or anything and therefore does not lose the indexing already had.
Very good script