Have you tried searching for that error?

http://support.microsoft.com/kb/916760

"This problem is most likely to occur if you start the SQL Server 2005 installation from a folder on a network share or on a hard disk when the folder was copied from the SQL Server 2005 installation CDs."

And you appear to be installing from "G:\Sosialisasi SIMDA BMD Lamsel\SQL 2005 STANDART EDITION\SQL Server 2005 - Standard Edition\Disk1\Setup\SqlSupport.msi"