Just appeared on the Mitsu YouTube channel...
http://www.youtube.com/watch?v=mCpuVh0ZAm4
1) Turn key to "on" or "acc"
2) Press and hold the "clock" button until the "hours" digit in the time flashes
3) Press the audio |<< Up or Down >>| buttons to change the hour
4) Press the "clock" button again to make the "minutes" digits flash
5) Press the audio |<< Up or Down >>| buttons to change the minutes.
6) Press "clock" again to lock in the set time.