can you modify an existing virtual hard disk (vhd) file?
Steps to Modify an Existing VHD. To modify a VHD, you must create a task sequence with the steps required to modify the VHD. Then, select the task sequence in the Modify Virtual Hard Drive Wizard. The wizard attaches the VHD to the virtual machine, runs the task sequence in the VHD, and then updates the VHD file.