The link to the mini-installer is indeed down, we got a new one yesterday and I forgot to update the website, thanks for reminding me.
This is the correct link to get the hero mini-installer
http://www.mediafire.com/?tzx0jxfz5xk
As for the full 2-part installer, you have to make sure to download both parts to the same folder before installing otherwise it will not work, that's because it is separated into 2 files but is actually 1, when extracting it will combine them together. It was working fine last I checked it.