you will need to use super glue to attach the photoetch to styrene..you will also need some bending tools,a good tweezers,magnification,bright lighting and above all,
patience,to do photoetch effectively. take your time and work your way through it. It
will be very daunting at first but the payoff is absolutely worth it,so dont get discouraged if you hit snags ( alas,you will!) along the way..photoetch is one of the best things to come along for modellers since super glue..as for a tutorial,I have no clue