Thanks fellas.
I don't actually have an EQ6, but I've been asked a few times how to do it. It's good to know that the only cable needed (apart from serial to USB) is the firmware update cable. I remembered that it was a Celestron selection in setup, but the cable that was being used last time wasn't the correct cable. Should be np now hopefully. No one that's asked me is using the EQmod but I'll keep this thread bookmarked for when someone does.
Maybe one day I'll buy myself on of these EQ6s and see what everyone is raving about