Ver 188.8.131.526_PV was released on Mar 11, 2009 for Windows Vista 32-Bit
Ver 184.108.40.206.1666_PV was released on Mar 11, 2009 for Windows Vista 64-Bit
Ver 220.127.116.1142_PV was released on Mar 15, 2009 for Windows XP 32-Bit
Ver 18.104.22.168.5042_PV was released on Mar 15, 2009 for Windows XP 64-Bit
These are the latest versions for Windows XP & Vista (32 & 64-Bit)
Intel Go Green, Save The Environment!
Well, i have just checked on the website Download Page for the Motherboard.
If you have Windows XP/Pro 64 bit, the latest driver is 22.214.171.124.5042 Dated: 3/15/2009.
Otherwise, Windows XP Home / MCE/ Pro, the latest driver is 126.96.36.19942 Dated: 3/15/2009.
For Windows Vista 64 bit, the latest driver is 188.8.131.52.1666 Dated: 3/11/2009.
Otherwise for Windows Vista 32 bits, the latest driver is 184.108.40.2066 Dated: 3/11/2009.
Hope this helps a bit, Kip.
The 220.127.116.119 driver is the latest for the DG45ID. 18.104.22.1686 was released later however it was primarily a dot release for the 3 series chipset. For the 4 series chipset, the 22.214.171.1249 driver is the latest with fixes for issues and enhancements specific to the 4 series. You can view the release notes for the drivers to see the additional features if any, and fixes for the driver.
There is a good FAQ on graphics drivers that can be found here: http://support.intel.com/support/graphics/sb/CS-028686.htm
Also, there is an online tool to determine what graphics driver your system has and if it is the latest available for your chipset , it can be found here. http://support.intel.com/support/graphics/detect.htm
Hope that helps!