For those with the 16HMz AT328P version of the SparkFun Razor9DOF board who also want to run the DCM based AHRS code, this may be of interest.
First read Jordi's post for the ArduIMU and Razor6DOF boards:
To remove the 3 highpass filters from the original 9DOF board, C1,C2 and C19 are removed and replaced with shunts (or just shorted). R5,R8 and R16 are also removed. Photo below shows board after modification with capacitor locations marked "J" and resistor locations marked "X".