I would definitely recommend updating to LDMS 9.5 with the latest Service Pack and component patches.
I have another instance of someone with an M93z and it worked fine at the latest Service Pack and patch levels.
The latest component patches are now available in patch manager content.
But atlast it worked!! found the correct Win7 drivers.
Can you post a link?
I found the solution by trail and error.
Downloaded the M93 Win 7 network drivers from the lenovo website and extracted them.
Added the inf file named "e1d62x64.inf" to the WinPE and it worked.