Actually, I did, Sean. However, I ran into warnings that made me stop and ask two simple questions in an effort to save myself some work and ensure good communication.
While waiting, I proceeded with the install, seeing screens that bore only slight resemblance to the screens provided by the SS people here: http://doc.silverstripe.org/installation-on-windows-pi
(I'm guessing that's because the installation is aimed at Win 7 people, not the Vista users.)
After seeing the "Congratulations! You've successfully installed ..." message, I clicked Finish and looked for a way to launch Silverstripe.
I'm still looking. I don't know how to launch SS and I see no executable that would indicate a way to launch it.
But, I've learned this much: the SS installation and support process is unrefined and needs work.
I know you're busy, so there's no need to answer -- I'm moving on to a different CMS now.