How do I unlock interior front trunk release for 1990 Porsche 911 will not unlock with any key I have

SOURCE: my Porsche Key fob no longer unlocks the doors

Insert key into door barrel or ignition lock and turn key, whilst doing this press the unlock/lock button, the led on the dash should flash to indicate this has initialised the key to the car, then remove key and test operation of remote. If this fails then a new remote plus coding to the car by your dealership is needed

SOURCE: My Porsche Cayenne S Key fob no longer unlocks the Door

unlock the door then press the lock button on remote and hold down for 20/30 secs.manual does say hold button.....

SOURCE: Replacing front spoiler on Porsche 911-996 - how do I do it..?

If you mean the small lower lip spoiler, remove the screws from the inside edge near wheel (1 small phillips screw each side) then tug spoiler fromone end to release plastic lugs that locate spoiler into front p.u.

SOURCE: 2006 Porsche cayenne trunk will not open.

Emergency operation of rear lid
If the rear lid cannot be opened with the radio
remote control (e.g., if the battery of the remote
control is dead), the emergency operation must
be performed:
1. Unlock and open the driver's door with the
vehicle key.
2. Switch on the ignition so that the alarm system
will not be triggered.
3. Check if the TAILGATE function is activated in
the multi-purpose display of the instrument
panel.
Please observe the chapter “TAILGATE” on
Page 119.
4. Press the central locking button in the armrest.
The rear lid is now unlocked and can be opened
with the unlocking handle

SOURCE: porsche 911 horn

maybe the other one is out of order, check the wire see if it connected .