Couple that with a stain/odor blocking primer and the hope is this will cure the stench.Hopefully others will chime in with actual results.

-Have the HVAC unit cleaned out and use -Rent an Ozone or hire a company to clean the air-Replace the drywall all together-Another option is to clean, paint with KILZ (removing most of the odor but not all), and to simply market that unit as a smoking unit.Hopefully this helps Nathan

My wife and I headed out and were given a tour of the property - it was beautiful from the outside, but needed tons of updating from the inside (1950s gold trim everything, severely outdated appliances, pet odor and she was really proud of the new linoleum floors in the kitchen).

Is there a way to remove a dog odor from a home without replacing the carpet?

I use them all the time on heavy smoke and pet smell houses and it works great in neutralizing the odors. 

Rent a decent ozone machine get rid of the odors.

Also used lots of "natures Miracle" spray bottle which neutralized the urine/odor using enzymes. 

The new Chinese drywall can has sulphuor odor causing head aches and some people get sick when the humidity is high. 

Mining operation were abandoned and the Township used the 65’ pit as the town dump for a few years until neighboring communities complained about the odor.

It's what major hotel chains use for hard to get out odors.