not sure why someone would use a m2d rom, but not use m2d.....you're better off using a non-m2d rom.
anyways, if you're using my latest m2d rom + HTC Home, yes the cube is disabled. make the below regedit to enable to the cube.
Code:
<characteristic type="HKLM\Software\OEM\TFLOSettings" translation="filesystem">
<parm name="EnableCube" datatype="integer" value="1"/>
</characteristic>