Microsoft CRM 3.0 Originating lead question

Hi,

My question is mainly about the advanced find option.  

My objective is to extract the results of my search concerning the opportunities of my staff but I would like to have some specific information on the originating leads.  For example, I would need to have the lead sources associated with the lead that became an opportunity.

I know that the Advanced find option gives me the possibility to edit a lot but I have yet to find a way to add this kind of information in my colomns.

As the title says, I am on CRM 3.0

Thanks

Mathieu Roy