Hi, I am new on using the program Geant4. I got it installed into my window xp computer from the instruction from http://geant4.slac.stanford.edu/installation/ I am currently looking for some tutorials on how to use the program. I found some helps from http://geant4.in2p3.fr/2007/prog/prog.htm and http://hypernews.slac.stanford.edu/HyperNews/geant4/cindex, but I only learned the information in broken pieces, since I do not know much about computer. Does anyone know if there is any simple geant4 program examples with some sorts of walkthrough for beginner users? It cane be just a simple particles passing through a slab of lead. I just want to learn how to write a simple code from scratch that can run. Thanks.