Success!

I just got done doing the AutoEQ setup and it went great! I used a $25 clipon lav. mic from RadioShack along with an extension cable so that I can remove the microphone but keep the cord hooked up.

I printed out Rob's post and brought it into the car with me. You have to make absolute sure that you have all the sound features turned off (we have a ton of them!) He managed to include most of them, but you have Auto Volume Adjustment in both HiJack and the empeg software as well as "Stereo Seperation" and "Left/Right Time Alignment" to turn off (empeg and HiJack respectively).

Turn off repeat and shuffle too.

The microphone I picked up is a clipon type, so I clipped it onto my shift, right by my shoulder and set the volume to -20dB.