Many folks elsewhere have
already done this
CHECK OUT THESE SITES:

buildingscience.com
Architecture/Building Diagnostics
firm offers a number of studies
detailing energy efficiency strategies
greenbungalows.com
Case study detailing Chicago
green building project.
nowhouse.com
Case studies of a Canadian program
to retrofit existing homes to
Zero Energy one house at a time.
housingzone.com/project-seer/
Deep energy retrofit of a 1930s
era home.Superinsulating blog of
retrofits in Massachusetts.
affordable Home Comfort 2008
Presentation describing stategy for
retrofitting existing building stock.
zeroenergybuilding.org
Another zero energy competition
for Northeast builders