I was getting a "Preparing to Install..." message with the addons but I figured out the problem I was having. I used the .dll's from my Windows install rather than downloading them. Once I replaced those .dll's with the downloadable ones the addons installation worked.
Also, with the addons I had to alt+tab to the installation screen each step because it defaulted to just a the blue install screen. For a split second it was confusing.
In the end it worked great. Thanks for the great instructions! Would have been lost without them.