Firewall helper plug-in for netsh - fwcfg.dll - allows you to configure
firewall settings on SP2 with network shell command line tool.
Please check if in your image has "Windows Firewall/Internet Connection
Sharing (ICS)" component included.
You didn't seem to include all the Netsh required components (this is not
about helper dlls).
Check if you got these:
a.. CMD – Windows Command Processor
b.. Network Command Shell
c.. Network Command Shell Interface Context
d.. IP Router Monitor Library
The following are also helpful:
a.. Home Networking Monitory Library
b.. Network Diagnostics
c.. Remote Access Monitory
Please also make sure to resolve all the component dependencies.