The "hack" is not just a simple link - it requires significant code changes to the existing search function.
For that matter, a completely separate search function/file would probably be a better way of approaching it. On larger, high activity forums, you would also need the ability to restrict its use to avoid overloading your server.
A new approach to search is being examined, but it's not going to happen in the short term. In the interim, you could try posting a bounty at dfbounty.org
It's crude, but works and will get you by for now - attached is a modified search.php file called lastposts.php - unzip and add it to your /modules/Forums/ directory. It will only work for registered members.
If you want the posts for the last 1 day, the LEO link is
For the last 2 days, the LEO link is,
You can add the link to your template or to your main menu.
Server specs (Server OS / Apache / MySQL / PHP / DragonflyCMS):
Joined: Apr 28, 2006