Woody,

Have you considered http://www.enginuity.org? Totally open source software that was originally developed for the Subaru WRXs and Mitsubishi EVOs and such. Here's the thing, if you can get the '.hex' file and put it back, you can probably create a good map with this software, it has quite a bit of flexibility in that you can build a profile for your particular ECU.

I'd be happy to help you tear mapping the image. I just had no clue as to how to extract it.

If I can learn how to extract it without having to desolder the chip (as you had to) then I'd be happy to help map the SRT6 image too.

Let me know if I can be of any help...