Experiment with voicekey

Hello there!
I've come by this program recently, looking for a way to implement a Hayling Test, but I'm now kind of stuck and in need of some assistance. If someone could provide me with some guidelines about how to structure my experiment (or point me to a similar one already made), I would be very grateful.
The subjects in this test basically have to listen to a series of incomplete sentences, saying outloud the word that's missing after each one of them. I would like to be able to measure the elapsed time between the end of the sentence and the response of the subject, and if possible, also to record said response (in order to manually classify it after)
I believe the script in this link http://forum.cogsci.nl/index.php?p=/discussion/1772/ is able to do that, but I don't even know where/how should I add it.
Thanks very much in advance!