Wow, that's some serious thread necromancy! (and memories of the good old days
You can download iSilo from it's website mentioned in my (old) OP. V4.25 isn't available any more of course, but you can still grab either v4.4 or the newest (v5.11) from http://www.isilo.com/download/index.htm
Hope that helps!
Edit - I notice you have an ipod, so you can bypass all this by going to the App store and buying iSilo there, it's still a bargain.