Found this .... Not sure this works on Immob' III vehicles...
Programming new remote controls
Two keys and all the remote controls that are to be programmed
will be needed. The maximum number of remote controls that can be
programmed, including old and new, is four.
- Insert first key into ignition switch, and turn it to
"ignition on."
- Insert second key into outer door handle, and turn it to
unlocked position for 10 seconds.
System alarm will emit three beeps.
- Take first remote control to be programmed and press button
-1-, two beeps will be emitted. For second remote control, press
button -1-, two beeps will be emitted. Use same procedure to program
third or fourth remote control. All remote controls must be programmed
within one minute, otherwise new programming will cancel and old
remote control programming will be valid.
- Turn key in outer door handle to unlocked position for 10
seconds, one beep will be emitted.
- Switch ignition off.
