As mentioned in my PM, I'm more than happy to help out any GTiR enthusiast free of charge. I would never charge any money to help diagnose problems, and just keeping fellow GTiR owners on the road is reward enough. However, as Lieghton has said, since the Mines ECU is a permanently mapped chipset, it seems unlikely that a map could have changed. Without looking at the ECU, it sounds that its been damaged somehow, either through a short circuit or something similar.
The first check would be to make sure all the pins are connected when you plug the ECU into your loom. You could also remove the ECU cover and check the Mines chipset is still firmly soldered into the existing architecture. If all this checks out, then I could download your maps and confirm whether-or-not its a mapping issue. I would highly doubt it is a mapping issue, as it simply sounds like a connection/soldering problem.
I'm more than happy to offer any assistance though,