Adding the Guest Additions drivers to WinPE..?

[spinjector]

Has anyone ever had any success adding the individual Guest Addition drivers to a Windows PE 3.x image..? This is the Windows platform that some programs like Symantec Ghost use as a base for their bootable system & recovery disks. The one I'm most interested in adding is the one that allows seamless capture/uncapture of HID devices, and perhaps the one that facilitates the automatic desktop size/resolution stretching when you resize the guest window, but it seems that function is based in VboxTray.exe rather than a *.sys driver file. ~Thanks.