One of the people I share an office with (yes I share an office with a couple of others as we have a space crunch but the office does have plenty of windows) - Luca Amapane, has just had a paper published on on Migrating Windows XP Embedded to Windows Embedded Standard 2009
Windows Embedded Standard 2009 is the name for the updated XPe operating system bringing together a number of updates to XP embedded. If you are currently using XP Embedded then you should take a look at moving to WES 2009 and this paper should help.