NSString*installText=[NSStringstringWithFormat:AILocalizedString(@"Downloading %@",@"Install an Xtra; %@ is the name of the Xtra."),(self.xtraName?self.xtraName:@"")];
NULL,@selector(sheetDidDismiss:returnCode:contextInfo:),nil,AILocalizedString(@"An error occurred while downloading this Xtra: %@.",nil),[errorlocalizedDescription]);