Use the moto_fastboot that is linked from the following.
http://forum.xda-developers.com/showthread.php?t=1255198
PS I thought I bricked my own D3 a couple nights ago, and the process at this linked saved my bacon!!
http://forum.xda-developers.com/showthread.php?t=1255198
PS I thought I bricked my own D3 a couple nights ago, and the process at this linked saved my bacon!!