I noticed a WinXP HighMAT update available on Windows Update tonight.

(similar info and possibly same file at: http://www.microsoft.com/downloads/details.aspx?FamilyID=2ddf1550-1c5c-44b3-87fc-9c6b37403c35&DisplayLang=en )

In any case... the link above is dated 9/2003 (September 2003). The update on Windows Update appears to be new. However, it's the only file I could find on www.microsoft.com/downloads that referred to HighMAT on XP. It's possible someone mistakenly misdated the page on microsoft.com - or the update on Windows Update could be a newer version. At any rate, if you have a CD or DVD burner on XP, you might want to look at Windows Update to see if the update is available for your PC. Windows Update referred to the new update in KB831240 (which I was unable to find in a search of http://support.microsoft.com/ ).

More info about HighMAT: http://www.microsoft.com/windows/windowsmedia/Consumelectronics/highmat.aspx