If you take out the centre air vent nearest the steering wheel (it just pulls out). There will hopefully be a wiring loom taped to some metal. In which case, all wiring is there, you just need the computer, indicator stalk, dash surround, temp sensor and washer sensor.

If not, it's a hell of a job to install. My focus doesn't have the loom. I have the equipment, just trying to find the time to retro fit =S