download this file here but be sure of what your drive # is
then make a .bat file called writenow.bat
edit that file and put this inside it:
physdiskwrite -u ZeroShell-1.0.beta8-CompactFlash512.img
after you save the file make a folder on the root named zeroshell, copy those files into that folder as well as the compact flash version of zeroshell in the unzipped state, and when ready run the writenow.bat file and follow the on screen prompts.
this works for me everytime, if you have an existing zeroshell configuration, be sure to back it up before hand.