gauges?

you were suppose to mark down where the needles were.

I dont know if this will work, but give it a try. Its a diagnostic trick. maybee it will put the needles in the right place. No idea but trying to help..

http://www.mustangworld.com/ourpics/fcar/dtcodes.htm

Edit: The initial sweep of the needles is what Im talking about.

Yeah you were supposed to make sure you wrote down where they were to begin with, but no big deal. I have a '00 as well and I had to go through this and I can give you some assistance. Since you do have a 2000 this link will work, as this is how I got my needles to be dead-nuts on again. Just read all the way through it and it gives you a digital readout of temp, oil pressure, fuel, voltage, and the best part is, it will tell you the exact RPM's and MPH.

The only thing is that you will have to set the four smaller needles first then turn the car on, and get the RPM's and MPH while you are driving. I know this might sound dangerous, but it works like a charm. Here is the link http://www.mustangworld.com/ourpics/fcar/dtcodes.htm. Let me know is you need further assistance.