I use MDT 2010 to install Windows on Mac OS X using Parallels Desktop.

I mount and boot LiteTouch_x86.iso to get to the Distribution share.
To get that working I had to include the scsi and network driver for Parallels Desktop in the boot image.

Here is what I did:
Get the ‘Parallels Tools’
Extract prl-tools-win.iso (I use WINRAR from RARLAB)
Run setup.exe (I run it in a temporary VM to keep my machine clean)
Reboot
Goto “C:\Program Files (x86)\Parallels\Parallels Tools\Drivers” (I run on a x64 installation here)

Import the scsi (prl_scsi) and network driver (prl_eth5) into your winpe driver repository and re-create your boot files.

Now include the drivers into your common driver repository.

I have mine based on this method created by Johan Arwidmark. I’ve created a folder called ‘Parallels Virtual Platform’ (Model property) for each OS Architecture, copied the prl_* folders into this folder and renamed the folders using the Class as foldername:

If I have more that one driver in a Class then I create subfolders called 1, 2, 3 …: