There are some new properties in MDT 2012 that can be useful.

ApplyGPOPack=YES/NO

In MDT 2012 there is a new function that will apply a local GPO during the deployment. In MDT 2012 there are four templates that will be applied automatically. If you open the templates folder in the deployment share you will see the following folders

If you don’t want them for some reason (not tested and verified) you can disable them using ApplyGPOPack=NO. I do however recommend you to download Security Compliance Manger 2.5 and import them and then verify that all security settings are correct according to your environment

HideShell=YES/NO

HideShell means that the desktop (explorer) does not show up until the deployment process is done, this will make it bit more complicated to interfere with the computer while it is being deployment. If you are deploying Windows 8 you should set this to YES otherwise the Metro UI will cover the deployment process UI and it will very hard to see if a deployment process is running

DisableTaskMgr=YES/NO

This one works in conjunction with HideShell, since HideShell does not prohibit the user to press ctrl-del and start the task manager, but this one does. My recommendation is to use this after you have verified that your deployment process works since it will also make it a bit harder to troubleshot some scenarios

OnBattery=True/False

This one is very nice to use, the new version of the gather process will now expose if we are running on battery and as you understand it is not a good idea to deploy a new OS on a machine that runs on battery, so modifying your customsettings.ini file like the example below will block any attempt to deploy a OS on a machine that runs on battery.

[Settings]
Priority=ByIsOnBattery, Default
Properties=MyCustomProperty

[ByIsOnBattery]
SubSection = ByIsOnBattery-%ByIsOnBattery%

[ByIsOnBattery-True]
OSInstall=N

[Default]
OSInstall=Y

/mike