you can contact www.tires.com. get their phone number from the website. They sell hubcentric adapters that will allow the wheels to sit properly.
This is of course assuming the lug/bolt pattern is the same. If I'm not mistaken, the Talon uses 5 lug wheels, and your new elantra uses 4 lugs wheels. Yes, they do make adapters that will allow you to convert them, but as bigZach stated, they are not safe.
quote from 4DoorGL:
"Told you. Random is cool as hell in person, even if he is a dick on the net
(j/k)"
Leave it to Random to Needlessly complicate things.