Deriving ACS Estimates without an existing MOE

I'm trying to map the comparison between ACS 2005 - 2009 to ACS 2006 - 2010 using statistical significance with the formula recommended by the Census. This formula requires that I use estimates and margins of error. The ACS 05-09 (Census 2000) and ACS 06-10 (Census 2010) geographies do not match and cannot map. I know that ACS has relationship files that I can use to relate the geographies and estimates. But how do I relate the margins of error?

Thank you.