Problem using JQuery in an Under Construction website template

Problem using JQuery in an Under Construction website template

Hello everyone, been looking for a solution to this one for a couple of days, with no luck, so am hoping someone here can help me.
 
I downloaded an under construction template from here that incorporates keith wood's countdown timer jquery plugin.
 
Its a perfect template for my site. Trouble is i just can't find a way to adjust the timer.  it works fine, without adjusting any of the code but it's default display reads that there's 500+ days estimated to launch.  As it's for my business website i don't want people to be put off visiting again, so i wanted to adjust the timer to just a few days.  (i.e estimated time of launch 3 days, 72 hrs, however many mins & secs)
 
From my googling most people suggest that the code to change is located in the html file:
 
<script type="text/javascript">
$(function () {
var austDay = new Date();
 austDay = new Date(austDay.getFullYear() +2, 0, 0);
 $('#defaultCountdown').countdown({until: austDay, layout: '{dn} {dl}, {hn} {hl}, {mn} {ml}, and {sn} {sl}'});
 $('#year').text(austDay.getFullYear());
 });
</script>






 
Specific advice looks at the  "austDay = new Date(austDay.getFullYear() +2, 0, 0);" the only solutions i have found say to play around with the  "+2, 0, 0" part, i have tried allsorts of ways but either the timer does not change at all or displays nothing. Others suggest to set the var austday=new date() to a specific date, tried that and nothing happens.
 
I am guessing that there is more to it than changing the HTML. I also looked at Keith's site, but i'm not technically minded enough to understand what his examples do or where they go within the code structure.
 
So if someone can tell me what files needs to be tweaked to adjust the timer to reduce the number of days, and how one would go about it. 
 
Don't know if it makes any difference but am working on the files in dreamweaver cs4, i have tried the authors of the template, but no response.
 
I really would appreciate any help at all.  Thank you :)