everything u see in post#3 is all that u need to know to convert a 480 to a 580 BIOS. The updated table versions doesn't matter in any way, they do the same thing for the driver, after all.
So, i took the original BIOS, added the magic UEFI, raised Vcore and changed clockrate to 1340, changed power limits and the cosmetic stuff. Latest versions also have the 1000MHz step, for which the PowerPlay table needs some changes, and the lowered idle voltage which is right next to the max Vcore. Fan table wasn't of any concern, since it was the original BIOS.
For the real 580 conversions i took a BIOS from a 580 card with an IR controller. I changed VOI table for the VRM stuff, changed PowerPlay table for compability, erased original vendor things, changed fan table, cosmetic stuff,.. and everything that is found in the list in OP. I don't have data on the output ports, so the extra ports might not work properly if they are any different.
Right, the "magic" isn't common knowledge, i should also add some info to post#3 someday..
the magic relies in booting in UEFI mode with a modded BIOS. And not just modded, it can be modded all over again and no new checksum or hack or anything is a problem. System will still boot in UEFI mode. Where the magic stops is with the "secure boot" option, because u can stop the UEFI part checking for modded BIOS, but the signature check for the UEFI part will fail then. Can't do.