hi can anybody tell me how make a object a child of a other object through script??? please help!!!
Check out the Scripting reference for Transform.parent: http://unity3d.com/support/documentation/ScriptReference/Transform-parent.html
The examples are for the camera, but I expect it would behave the same way with any other game object.
Looks like the code is
// make it a child of the current object
yourGameObjectHere.parent = transform;