Sorry for your trouble, Steve. You are lucky to have already received great advice from three REAL EXPERTS!!!
At this point, I would suggest that you start over.
Try some lock specific lube (and redo this as routine maintenance item at least yearly)...but if you have none now, try a little WD-40...which is not a good solution for the long term in my opinion.
Then, try the lock again while BOTH depressing the door handle AND leaning against the rear portion of the driver's door as described above.
Here is where my experience differs slightly. In the dozen or more Gen III's and IV's that I have had to open (YES...by making a "house call"

including to a dealership on behalf of the owner), I have had a 100% success rate by leaning HEAVILY on the door using my thigh or hip during the process.
Folks coached over the phone using the same technique were also successful...including one yesterday afternoon!!
If you still cannot get the key lock to work...time to visit an experienced, SRT-qualified Viper Tech.
Good luck.