Looking for "green/integrated' home system for using an evaporative cooling system / a/c system for a home in the DFW area. Ideas?

DFW Metroplex avgs are tracked here: http://bit.ly/MfvxY2. Avg low humidity levels run from 37%-50% & avg high humidity levels 80%-88%. With SUPER HOT & SUPER DRY- Wild Fire type conditions, the lower humidity levels in recent years are more likely. I know commercial buildings using "sealed evaporative cooling systems" in our area, which defy the info I've found about home systems, since they DON'T bring outside air into the building & are pressurized. I've walked through their roof top evaporators & can confirm that they do use evaporative cooling. Such systems are "supplemented" by normal condenser type a/c systems for days when the humidity levels are too high for normal evaporative cooling & spoken to the maintenance staff in such buildings who confirm that annual energy savings are significant. Does anyone know of a similar integrated system made for home use? How to go about building your own system? Those opposed to using such "green" systems in our area point to web pages like this one: http://bit.ly/Mfxd43 to show that these systems aren't effective enough in our area to warrant wide-spread use. Any help with information on "integrated evaporative condenser a/c" systems?