Did you read his question^?
hand job, yes.
Yes, he did, and his answer is correct - you can run threaded forks on a threadless headset by using the threaded compression nut. Granted, the main advantage of a threadless headset is so that you can use a more easily adjustable compression system, but you can certainly use a threaded fork while you're "in between" setups.
Now the Bonus Question: Can you use HIC or ICS with a threaded fork?