I presume this address is no longer valid as they would have proberly finished filming. Does anyone know where else I could write to them?

Yes, it say's
'Busy Shooting now,
my best'

Harrison Ford LUCAS FILMS LTD PO BOX 29901 SAN FRANCISCO CAL 94129 (temporary addy for Indy 4) I sent my letter, IRC & SAE on JULY 1st 2007 and received a reply nearly a month later on 28th July 2007 He signed my photo. Am very happy. This my 1st success. http://img234.imageshack.us/img234/7484/...