I thought the 1978 study was interesting because they artificially elevated interior humidity to 35% and held it there. Hardly a normal condition, yet ordinary paint did better than expected. Unless you run a humidifier 24/7 or are in a area with a unusually high water table, do you really get internal humidities that high? I lived in PA during my youth, (dreary Erie mistake on the lake!) and I remember much drier conditions inside during the winter.
One of the notes in the study suggested that manufacturers should produce vapor barrier paints that could do the job better. Of course, that was a long time ago. In the ensuing years there are many such paints. A simple Google for vapor barrier paints will find many formulations that have the reccomended permeablity of less than one.
Ripping out and redoing sheetrock might be an easy "few hours" for a pro, but it is more like a few days to a week of really messy and exhausting work for an amatuer like myself. If you hire someone to do it, it can add a lot of cost to the project.
My suggestion was to give the OP an option that will get the job done cheaper and easier. Using blown in insulation and vapor barrier paints is one way to go. Vapor retarding paints are reccomended for existing construction in even colder climates by the US Dept of energy.
http://www.energysavers.gov/your_home/insulation_airsealing/index.cfm/mytopic=11810