I found two books might help for developing UDK Script.
Actually, they really did! If you are just new to UDK script then I strongly recommend them.
especially the first one :
Unreal Development Kit Game Programming with UnrealScript: Beginner's Guide.
Week One: Spending time set up the Visual C++
Week Two: Follow a lot of tutorial and getting understanding how UDK script work. spawn a cube base on camera' position and rotation.
Week Three: Make a Box follow player camera and also save the data by using Tick()
Week Four: Replay the box movement.