This is just a guess but the 01 magnums didn't have a problem with the UDP, but 02's did. They kept popping a charging code and couldn't figure out a solution to a fix. My guess is the 03 might have the same problem but only way to tell is for someone to buy one and slap it on.
O3's dont seem to have the problem just the 02's and I havent heard of any of the PT guys complaining and I bet that the PCM in the SRT is more like the PT/GT pcm which was the engine was orig intended for.. Please let me know how it goes if someone does this.. If your in southern maryland I can install it for you in about 25 minutes for jack up to jack down and Yes I have the Miller tool hehe.