I found the easiest thing was to download the IMG file from the FTP site, and then go back to the HTTP site and download the auto-install package on its own. Extract the files and then, assuming you went for the IE version, rename IEDOC.IMG that you downloaded from the FTP site as EMBED98.IMG and put in the same directory. Then just run HACKWP and it works wonderfully.
Thanks to those who put this stuff together and who are hosting it. I am amazed at how easy it was to hack this puppy without even taking the back off... I just undid that little door with an eyeglass screwdriver, popped the DOC out, put in my websurfer, put it back and everything worked! The only glitch was my download manager messed up 3 bytes in the IMG file first time round. Oh well.