How to display topics created in last x days?
 

I would like to add a link to a custom search that would display all the topics that have been created in the last day or last week.

What I am trying to do is similar to the getdaily link that is already included in vBulletin. Getdaily link displays all the topics with new posts in the last day but I would only like to display the topics that have been started in the last day and exclude older topics.

I found an old post describing something similar but it cannot be used to do what I want.
http://www.vbulletin.com/forum/showthread.php?t=107955

Any ideas how to achieve this?