Quake3World

I have a file from someone and it is a .stu file extention. I think he used pinacle studio to make it.

I cant fine anything to play it and wondered if you guys knew anything about it.

http://filext.com/detaillist.php?extdetail=.stu

Looks like it is pinacle studio, though I know nothing about. (maybe the page tells you more, haven't looked much further than the name)