I don't think there is a group policy editor for Home premium... i think its only professional and up.
Best thing to do is: make all computers have static IPs.
Create the Batch file:
cmd / c shutdown /s /f \\192.168.2.8
cmd / c shutdown /s /f \\192.168.2.9
cmd / c shutdown /s /f \\192.168.2.10
Create a batch file like this...
the CMD will execute the command prompt... the /c will carrier out the string and then terrimate
shutdown is the string command, /s will shut the computer down /f will force it to shut down all apps immediately and then the computer name next to it
just that when you create the batch file... don't include all those equal signs...