The MDT docs about setting keyboard layout in the MDT 2010 (Lite Touch) boot image is slightly incorrect… Here is how you do it..
To set keyboard layout in the MDT 2010 (Lite Touch) boot image to swedish (in this example) you configure the following rule in bootstrap.ini
You do not need to set this in customsettings.ini, nor can you use the sv-SE LCID type (this is were the MDT docs are incorrect), you need to use the old XP-style syntax. Don't forget to update the boot image after adding this to bootstrap.ini.
When starting a boot image with this bootstrap.ini, the Lite Touch script will run wpeutil.exe SetKeyboardLayout 041d:0000041d. You can also see this in the Litetouch.log file.