Superchips makes one that is universal for 96-03 4.6s and even works on the 03 cobra. It works great, I ended up with the superchips off of my dad's car, and I like it better than my hypertech.You can read dtcs with it, which is an option that you don't get with the hypertech.Plus, if you get the hypertech, it is more car specific and would be harder to sell in the event you wanted to.
just my .02
also, what features can you guys change.. my car is an auto, so i want to change the shift points, firmness, stall(if possible), calibrate for gears and offroad exaust.
I have the superchips. HP gains are impressive, can't change gears or speedo like they advertise. Try Ebay, you can get them there for CHEAP. Don't know about shift points as I have a 5spd.