How to update Bios (Phoenix - AwardBIOS v6.00PG) easily?

??? i have bought my pc in 2006 and am looking to update its BIOS.
please tell me where to download the software and how to install it?
and what are the advantages of updating the BIOS?
CHipset - intel corporation
Model - D101GGC
Version - AAD35788-307
system slot - 4PCI

BIOS
Phoenix - AwardBIOS v6.00PG
BIOS Type: Phoenix-Award
BIOS Date: April 20th 2006
BIOS ID: 04/20/2006-RC410-SB450-PTRC-GC-00-None
BIOS OEM: GC11010N.86A.0311.2006.0420.1525 - GC11010N.86A.0311.2006.0420.1525
Chipset: Unknown
SuperIO: Unknown
Manufacturer: Intel Corporation
Motherboard: D101GGC

Topics moved, its suits hardware section better.

HI..
Its called Bios Flash, for your board, intel provides all instructions as well updated bios here:
http://www.intel.com/support/motherb.../cs-021749.htm