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@polybikeuser
I agree with pip that there's no straight forward hassle free way to do this and it begs the question what's your reason for wanting to do it? Also what size quill stem are you trying to use 1" or 1 1/8" and does the fork have a carbon or metal steerer?
If the fork has a carbon steerer I'd suggest you give up now, or if you really want to use the quill stem fit a different fork, as I'm pretty sure trying to tighten a quill stem wedge in a carbon steerer is a sure fire way to bust your steerer.
If the fork has a metal steerer and the quill stem is 1 1/8", you could, in theory, use a USE Ringo Star (see http://www.chainreactioncycles.com/Models.aspx?ModelID=2741 ) to compress/hold your headset together, relieving your stem of this duty. Then as long as the quill of your stem will fit inside the steerer you could fit it just as you would with a threaded fork. I'm not recommending this, as at best I think it'll look peculiar, at worst acutely Heath Robinson, just saying in theory I think this would work.
If you've got a 1" quill stem you're desperate to use with a frame that has a 1 1/8" headtube and is currently fitted with a 1 1/8" carbon fork I don't see how you're going to do this without ditching the fork (and current headset), but as long as the frame is designed to take a coventional headset (with press in cups) and not for an integrated/hidden headset and you're willing to ditch the fork you could fit reducer rings in the headtube so that you could then fit it with a threaded 1" headset and fork.
So, no, can't see a straight forward way of doing this.