For a standalone installation with the serial number set in the install the following can be used. I saw some other more eloquent install switches using an .ini for the entire install. However, I got this one working before I could experiment with the other method:

Here's the command line (in batch using the %~dp0 local path variable) to install directX which I've heard does some special things for AutoCad even if DirectX is already installed:

"~dp0Autodesk_Maya_2011_English_Japanese_Win_64bit\support\DirectX\DXSetup.exe" /silent

c++ redistributables needed as prerequisites which I didn't add here since I had them installed as part of my Win7 base

Here's the command line I used to install Maya and set the serial number:

msiexec /i "%~dp0Autodesk_Maya_2011_English_Japanese_Win_64bit\x64\Maya\Maya2011.msi" /passive ACADSERIALPREFIX=<prefix> ACADSERIALNUMBER=<SerialNumber> ADLM_PRODKEY=<Product Key> ACADFIRSTNAME="FirstName" ACADLASTNAME="LastName" ACADORGANIZATION="Org" InstallLevel=5

Next, I used the following command lines to install the rest of the components including the media ray component which I had available with the media I was using:

msiexec /i "%~dp0Autodesk_Maya_2011_English_Japanese_Win_64bit\x64\Maya\Maya_Docs_en_US2011.msi" /quiet /norestart
msiexec /i "%~dp0Autodesk_Maya_2011_English_Japanese_Win_64bit\x64\BackBurner\backburner.msi" /quiet /norestart
msiexec /i "%~dp0Autodesk_Maya_2011_English_Japanese_Win_64bit\x64\Composite\Composite2011.msi" /quiet /norestart
msiexec /i "%~dp0Autodesk_Maya_2011_English_Japanese_Win_64bit\x64\DirectConnect\AutodeskDirectConnect4.0.msi" /quiet /norestart
msiexec /i "%~dp0Autodesk_Maya_2011_English_Japanese_Win_64bit\x64\MatchMover\MatchMover2011.msi" /quiet /norestart
msiexec /i "%~dp0mrsat3.8.1-maya2011-64bit\mental ray Satellite 3.8.1 for Maya 2011.msi" /quiet /norestart