driveshaft safety loop install?

Hey guys. I've had a new Competition Engineering driveshaft safety loop lying around for a couple of years now. I really need to put it on. I'm going to the track at the end of this month, so I'm wanting to put it in before then. How difficult is it? And do I have to drill completely new holes through the floor board to mount it? Or are there any existing holes underneath there that the kit might use? The instructions are not of much help. Any info. would be great.

Thanks-
Simi