How do you export CC mail addresses

Hi

I am at present collecting all email addresses into an excel spreadsheet so we can carry out some email marketing. I have found it very simple to simply "add to address book" from single email addresses and then export this to excel, the problem is I have 4-5 emails from various contacts where they have CC'ed 100's of email addresses and its these I would like to grab/export into my spreadsheet.

Any suggestions would be great

Thanks

Paul