ok now my question is running towards editing an IRP file am i correct that this program will render out all the codes for the values given in the function range? so i will basically get all of them then choose what i want. however what do i do with the device spot does that even have to change? also where do i differentiate between different system codes? I know your explanation is good i'm just not that good when it comes to logic programming like that. give me some time and i can figure it out on my own but i don't have that much. sorry if i 'm confusing.