By default, WinPE 2.1 x86/x64 supports the VMware NIC model e1000. When possible, use this NIC model with your virtual machines. However, a virtual machine created for Windows 2003 x86 Standard Edition can only use the VMware Flexible NIC which is not supported by default.
To add VMware Flexible NIC support into the WinPE 2.1 x86/x64 automation environment: