This one is pretty simple. This modification is simply to add the SCWinRE.vbs script to the list of scripts that are copied over to the local hard disk. The modification is around line 56 (MDT 2013 Update 1 version).

"SetupComplete.cmd", "SetupRollback.cmd", "ZTISetupRollback.wsf", "LTITriggerUpgradeFailure.wsf", "LTIBootstrap.vbs", "SetUpgradeStatus.wsf", _
"SCWinRE.vbs", _
"LTIBootstrapUpgradeSummary.vbs", "UpgradeSummary.wsf")