OK you are looking for cold. With it being winter I figured the opposite and you were looking for heat. You must be out in the southwest. In my area AC is not even on the radar yet.
In that case it is not a 20 minute job. The dash has to come out, the AC system has to be disconnected, the heater core drained and disconnected as well. Then you can remove the entire heater case. The actuator for the passenger side is on the back of the case.
Adding R134A will do nothing. Both sides use the same heater core and AC evaporator. The doors inside the case determine if you get cold or hot air by directing the air through the appropriate path. As you have cold air at the drivers side the AC is working good, just isn't being directed to the passenger side.
If one of the blend doors was removed it is even more work as the case has to be split to replace the door. While it is out and split I would probably replace the heater core and the evaporator, they are 18 years old and probably getting thin in spots.
If it was me and I was thinking of doing the repair myself, I would be very tempted to visit a you-pull-it yard and get a complete replacement heater case assembly from an identical vehicle. This would give you a practice run for your own vehicle. Test everything on it. Replace the heater core and the evaporator and make sure all is OK. Then tear apart the car you have, you could then save some time as you would remove the one you have and install the "new" one.
If you take it to a shop you will get it returned faster but it will be expensive. Your call on that. One advantage of a shop is that if they do the job and the dash rattles or the system does not work right, they will repair it.
Sunday, March 26th, 2017 AT 12:24 PM