I don\'t know if its any help, but I\'ll write my own experience with this.
I first downloaded from the \'Primary download site\' and the Chapel Hill, NC location. I started all the downloads at once. When I tried to install and run it, I got the incomplete/corrupted message.
I then downloaded from the \'Primary download site\' and the Reston, VA location. I was carefull to download the parts one at a time and did nothing but surf the web while waiting (no serious cpu or bandwidth use). These installed nicely and without problem.
Just a little data, hope it helps.