i3 build

Okay, so i've successufully managed to install "El Capitan" on the following configuration:

Core i3 530 @3.6GHz
MSI H55M-P31
4GB of DDR RAM
250GB SATA drive
GeForce 8800GT 512MB

What's working: display, ethernet, shutdown, usb, so almost everything.

First problem is audio, tried to install ALC 889 kexts through MultiBeast, but doesn't work, second problem is booting the system. If I boot it through USB stick I installed it from, it will boot fine, but if I remove USB stick and try to boot...

i3 build