When you have a "long message", your first thought should be to post what it says!
When people follow these instructions they seem to somehow completely miss either the openal or packingskips steps. It's likely a better idea to use the installer, without sleek launcher as this is causing a few problems with some users.
The video link saved me, i didnt get that step where you have to copy the packingslips and put them in the correct place. Once I did that I was in. Thank you!