301 redirect in vbulletin v2.2.9

[getthat]

Hi Guys,

I've got to rename the urls on my vb site (e.g. www.site.com/1/index.html will become www.site.com/1/2/index.html). I've got to do this via a 301 header in php to make it look attractive for the search engines. Headers are formed in the global.php file but how can I implement this ? It are just a few urls that have to change (about 80% which will have to be redirected).

Grz