I use the YAHOO website and lost my ID. In restoring the ID I lost my e-mail contacts.

Did you have them anywhere else besides Yahoo? You can populate the list if you use another program also.

No. Yahoo was the only account.

Did you ever send out or receive a bulk email from all or most of your friends? If so you can use that information if you have it in your list to rebuild from. Examine the header and it should be in there.