Unless I am mistaken, the zergrush is a windows binary application -- it won't run on Linux, OSX, etc.OK noob questions coming up, can't find the answer!
I am doing it manually using zergRush exploit rather than the other link, as I am on a mac and would like the experience anyway. Maybe this is where I'm going wrong!
EDIT:
So now i booted windows, installed adb drivers, and rooted with the kit, simples... Rom Manager working fineThanks chaps