http://unity3d.com/support/documentation/Manual/Instantiating%20Prefabs.html
I wonder where is the tutorial sample to downlaod ? can you give me a link,thank you !
The First Person Shooter?
if yes, here:
http://unity3d.com/support/resources/example-projects/3rdpersonshooter
It has 3 examples for this topics:
http://www.unity3dstudent.com/category/modules/
hi ,thankyou, rockysam! i have get some bee’s knees in the site you ushered me . i’m geat enthusiastic on those topic! keeping contact?
thank you, sandolkakos. i found it is too hard for me to enter Unity3d by line-by-line step on your introduced link. it is a confusion question that Unity 3d has not a entire tutorial sample show the beginners—what i mean is a simple sample which can cover the proceess of building a 3d game. i wonder how long can the Unity3d team realize the importance of making Unity3d to be prevalent platform.
It’s fine, but I am still a beginner. 
in your private message box, there is a letter i give you.go and find.