Best way to create archived/historic app versions

[eluser]yatil[/eluser]
Hi folks.

I programmed a website for a small conference last year, containing programme, podcasts and informations. The same event will happen again this year, so we need a new version of the website. I’d really just like to duplicate the app to use the old logic to register. Is there any possibility to use subfolders in a meaningful manner? (The website is already on a subdomain.)

The current website is located at http://atag.accessible-media.at/ and I'd like to move the site to http://atag.accessible-media.at/2008/ and do a new version at http://atag.accessible-media.at/2009/ — The root would just redirect to the 2009 subfolder. Are there any tutorials or a quick step by step introduction what I have to do to make a seamless transition?

Or is there a way to use the same logic for both instances and having just different database tables+templates?

I am really looking forward to your suggestions as I’ve been unsuccessful until now. If you need any more informations, I’m happy to provide them.

Regards,
Eric