Reinstall /System/Library/Extensions using another drive?

I messed up and cannot boot into my system (after reinstalling AppleHDA.kext). I booted into another drive and there were no files in the /System/Library/Extension. Is there a way I can use my install flash drive to put the original files in the proper place using my other install to fix my system? My only problem is that when I copied the files it states that the kexts don't have the proper permission using -v. Is anyone able to help me with this?

Specs:

Asus Z97-P

i7 4790k

GTX 780

submitted by /u/bigboiahoy
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