Another option available would be to disable SIP temporarily with macOS Sierra - I can't remember how to do this specifically, but you need to boot from your recovery partition, disable SIP from there it's just a command line to type. Then reboot as normal install your 'OLD' drivers as recommended by Michael and make sure they are working as expected .... If so, then rebuild extensions and system caches, reboot and re-enable SIP from the recovery partition.

If you are using a Hackintosh then adjust the SIP settings to Booter=0x28 and CSR=0x67 via Clover or whatever boot loader you are using, this effectively disables certain parts of the SIP to enable things like unsigned kexts etc. If you're happy with a reduced security environment within OS X, then leave those settings as is, but be aware they are likely to cause problems with future updates from Apple.

Martin