Can we customize the "Find Duplicate" Criteria screen

Dear All,

I have not been able to find any clues about how can we customize the "Find Duplicate Leads" Criteria screen, I want to add some standard fields into the criteria screen. Secondly i also want to customize the "Send an Email" Screen to add some custom fields. I prefer not to use a custom control in place of these screens. Please guide if there is any way to modify these screens.

Thanks & regards,

Irfan Shahid.