so I have no idea why I had problems with the SamPWND original files and instructions, but I've just successfully rooted using rootjunky's tutorial and files!! I'm going to try and flash this rom at some point, I'll report back
I just checked. That thread is not closed to questions/comments.
No idea why it WOULD have been closed. I follow it daily.
Anyway, If noone here has an answer that helps, someone in the original SamPWND thread might...