I always use the comet parked nearby to jump into the Golf course to the left of the entrance and then you can just use your guns to shoot the target while he's standing there swinging. Just letting you know about that in case you want to play that mission without help. There's also a way of using a car to ramp onto the golf course, you need to check youtube for that trick as I forgot where to exactly drive.
I found the video. I'll PM the link to you since it won't work here.
This post has been edited by Vanzant on Monday, Mar 5 2012, 23:25