There's also meant to be two more, QUIK and TCA5, but I haven't seen these or their bins. I've used a QH but not on one of ST ecu's, I do know that a guy in the 'States has done so. I have no experience with the Tweecer though I understand you are/were in touch with Mike Glover about it. A Superchips module contains a copy of all of the ecu's rom. Regarding their changes, let's just say I wouldn't do things like that.