Hey guys, just going to have to hope and pray there are still eyes on this.
I've managed to push through again (after years of trying beforehand) with the solution here, using yochenhsieh's patch (EU version installed here). Things look golden until start-up and I get an immediate CTD with no evident problem. I've changed the resolution in case but I don't run higher that 1600x anyway.
Have I blatantly missed something crucial??