Hey there, thanks so much for your help!
By swapping out the files, I have managed to get a little further now on the progress bar which is great, thanks to you.
Unfortunately... (yep, not quite there yet), I seem to still have issues getting into the installer. When I loaded the USB with the nv_disable=1 and -v parameters, I got this message, followed by a restart:
I thought to myself that it might have been a BIOS setting, so I jumped in to have a look, however HPET physically isn't an option in the BIOS.
I then added in a NullCPUPowerManagement.kext into the folder with the others, and tried rebooting. That time, I noticed that the Apple loading bar got to the end and just stayed there, so I rebooted in verbose. It appears to be hanging at "Using 16384 buffer headers and 10240 cluster IO buffer headers".
I have tried with various combinations of LAPIC patch, Haswell-E patch and USB Ownership, to no avail.
Still, looks like there is at least some progress
Thanks again for your help. If you have any ideas then that would be appreciated.
- Jack