Preparation:
 
Create the following folders on the root of the C drive:
C:\Mount
C:\Mount\Drivers
C:\Mount\BootWIM
Copy the drivers you wish to inject into the C:\Mount\Drivers folder
Copy \Program Files(x86)\LANDESK\ManagementSuite\landesk\vboot\boot.wim to the C:\Mount folder.
 
Execution:
 

Open a CMD prompt as Administrator.
Navigate to "C:\Mount".
Use the following DISM commands to mount the Boot.wim:
DISM /Mount-Wim /WimFile:C:\Mount\boot.wim /Index:1 /MountDir:C:\Mount\BootWIM
Use the following DISM command to add the driver:
DISM /Image:C:\Mount\BootWIM /Add-Driver /Driver:C:\Mount\Drivers /recurse
Use the following DISM command to unmount the Boot.wim:
DISM /Unmount-Wim /MountDir:C:\Mount\BootWIM /Commit
 
Cleanup and Deploy:
 

Copy the newly updated Boot.WIM file from the mount folder to the \Program Files(x86)\LANDESK\ManagementSuite\landesk\vboot\ folder.
If desired, you can delete the C:\Mount folder and its contents.
Redeploy your PXE Rep.
PXE Boot your client and verify the drivers are being correctly recognized now.