Help please. Multibeast not working, cannot boot from HD.

Hardware: Haswell i7 4770K, ASRock Z87 Extreme6 v. P2.4, 16G Ram, Asus Strix GTX980, OCZ Vertex 120GB SSD.

Using MacOS Sierra 10.12.5

Working: after running Unibeast, it boots into MacOS on SSD. Tried using Multibeast but it does not allow me to boot from the SSD without going to the USB first. Also, when installing the drivers for my onboard ethernet it stopped working and I had to start over again. I've also downloaded and installed the Nvidia web drivers but they are not working, can only support 1024x768. Also no sound despite selecting the appropriate drivers in Multibeast.

Essentially, all that happens after running Multibeast is that the ethernet stops working.

First up, I'd like some help on how to get it booting from the SSD. Any and all advice is much appreciated.