Worked perfectly to get my lost password on my Avic 930xbt, but not exactly following the above. To get your password, all you need to do is use the hack program to locate the password data file on the unit.
Load the program from the SD card just like in steps 1 through 3 (unzip the program to your SD card, stick it in, the unit will recognize it and go into hack mode, then you can goto file maintenance).
You need to find the password file. Something like user\system\security\password.dat
When you find it, select it (on the 930x I hit the mode button when I had the file selected