Hello everyone.
I have been watching this thread for a very long time but I have just registered to reply. I`m using iMacPro1,1 SMBIOS as this fixes problems with sleep (acceleration doesn't stop after wakeup). My EFI is frankensteined of everything from here, and I added some of my own parts in config with Custom memory and things like that. Im using Broadcom CS2 wifi and that also works as it should.
Only problem I have is with multiple monitors, I need to properly patch frame buffer for iMacPro. I will be sharing my config later. Thank you so much and I really appreciate everyones effort from this thread.