Welcome to the forums,
Your thread title says "
Open Source edition 4.5.6. & 5.0.1 keep saying: license filename UNSET" but you're trying to install "
zcs-NETWORK-" builds.
Do you have a NE license?
You can get a NE Trial license here:
/products/download_network.html
(I'd suggest testing it out

after 60days if you don't want to purchase a license you can always downgrade to FOSS, but you should really see all the possibilities-cuz it does rock!)
You probably should checkout:
Compare ZCS Editions
NE downloads:
/products/downloads.html
FOSS downloads:
/community/downloads.html