its VERY simple in fact i googled it to find out
CM8 is the Chassis Code,
check the 4th 5th and 6th number of the VIN
for example
i found this one:
http://www.oodle.com/view/2007-honda-accord-for-sale-by-owner/1526941525/
1HG "CM8" 2627A****** (last six dont matter for the chassis code)