I think I got it working. The computer recognized a new drive connected and I could read the nand. I dumped 2 49mb BINS which compared to be the same.
I never saw a memory size associated with the drive in j-runner, It was just blank. I dont know if that matters.
In the j-runner images for corona/coolrunner it says get a "full clean" nand dump. Does that mean I have to select full or are the ones I have fine?
I'm reading the RGH roadmap but ill ask here anyway: Is there anything else I need to do with the nand reader before moving on to installing coolrunner/RGH2?
Thanks.