As far as I know. Redkingmaster just ported DSP from other phone model to be work on ROKR E1/E398.
At first, me and my friends from Indonesian motolovers forum have tried to ask him to make a tutorial or teach us how to edit DSP (as he said that he was able to edit some DSP), but he refused to tell.
But later, we knew that actually he can`t edit DSP. He just ported DSP from other phone model.