Exclude crawling content based on creation date

Scenario:

One of my colleagues wants to exclude file / documents from the search result based on their creation date.

Steps taken to achieve:

There is a provision in MOSS 2007 to exclude specific contents from indexing using Crawl Rule. But it’s not possible to exclude contents based on creation date.

We have set - Information management policy on a doc lib and set Expiration policy which will start the workflow and move documents to another doc lib (i.e. Archive) based on their creation date

(To create custom workflow to move doc from one lib to another please refer

http://sharepointpratik.wordpress.com/2010/09/17/how-to-upload-a-document-to-multiple-document-libraries-simultaneously/ )

And on Archive Doc Lib select “No” to appear in search result option which will not crawl the content of that doc lib.