Who can tell me NSC's address

for updating my information. I concurrently filed my I140/I485 in April 2004 with NSC. Right now I am going to update my information concerning the I140 petitions because I just got a good national award in the US. Does any one know what address do I need to use for sending my updated information to?

BTW, I believe the evidence I provided to support my I140(EB1a/MIW) petitions was OK. However, I still hope to enhance my case by updating my information with the NSC. Have any friends done this way recently?

Your kind help is greatly appreciated!