got a nelsons 91 and my be getting some lts abd a few extra goodies wondered how i go about doing/getting/ and loading a new tune on my truck, do i need a hand heald tuner to plug into my truck to down load it to my ecm? and also is it possable to run a "flash tuner" on the tune? jw a buddie said he heard about it i though it wasnt possable? neways thanks for the help guys....