I just startet to test it (using 2008 as source) and found an issue on Windows XP. This may also a problem is other VistaPE versions or the GRUB-installer itself:
After successfully creating the ISO tried to copy it to my USB drive (and noticed that my robocoy syncing is still in use
![:)](http://reboot.pro/public/style_emoticons/default/smile.png)
The step that does not work is step "3 make bootable" (section BootUSB). The grub4Dos installer fails to install grub with the message "Can't run the background program". Using Sysinternals process Monitor I could only find one file system error that may be the cause:
grubinst_gui.exe tries to access the non existent file "C:\WINDOWS\AppPatch\systest.sdb".
booty#1