0-seconds run is still possible. Play as The Knights and accept rebels' demand which is ceding your only province to Byzantium.

This installer is exactly what I mentioned. I even included it before I edited it because I worried if it doesn't have any viruses. And by the way, at the moment of posting this, anyone can add any PP resources here.

Get yourself a Vista/7 virtual machine. There are also websites that offer downloading Windows 7 games on Windows 10, but as a Windows 7 user, I can't test if they're virus-free or not.

I think it's because he's the one who requested the game to be in Speedrun.com and they accepted and he didn't prefer to do any runs.