Windows Core: Install PowerShell 3.0 by using PowerShell 2.0

Run the script below in the PowerShell 2.0 on your Windows Core

(new-object System.Net.WebClient).DownloadFile('http://download.microsoft.com/download/3/6/1/361DAE4E-E5B9-4824-B47F-6421A6C59227/dotNetFx40_Full_x86_x64_SC.exe', 'c:\dotNetFx40_Full_x86_x64_SC.exe')
.\dotNetFx40_Full_x86_x64_SC.exe
(new-object System.Net.WebClient).DownloadFile('http://download.microsoft.com/download/E/7/6/E76850B8-DA6E-4FF5-8CCE-A24FC513FD16/Windows6.1-KB2506143-x64.msu', 'c:\Windows6.1-KB2506143-x64.msu')
.\Windows6.1-KB2506143-x64.msu

It is not unattended installation. You will be prompted several times to click Next.
net45
net45

Enable NetBIOS over TCP/IP

To enable NetBIOS over TCP/IP first identify the adapters index number using
wmic nicconfig get caption,index,TcpipNetbiosOptions

then using one of the following values:
0 – Use NetBios setting from DHCP
1 – Enable NetBios over TCP/IP
2 – Disable NetBios over TCP/IP

set the required NetBIOS over TCP/IP value to each Nic.
wmic nicconfig where index=1 call SetTcpipNetbios 1