Help! Followed very outdated guide to S5 Active root, won't boot!

Alright, so I mistakenly followed a guide to downgrade and root the gs5a from the factory version. I am on 5.1.1 with the NG3 kernel. I tried to reinstall the update, but can't due to status 7 because I'm on NG3 instead of OF3. How do I get from NG3 all the way to OF3?