I've been researching a problem with running Concrete5 on my XP laptop. I was getting that whole PATH_INFO error just like many other users in the forum. I could have just setup something else, but I really wanted to see if I could get to the heart of the issue.
And, I did!
IIS5 doesn't recognize /index.php/something/ the same way IIS6 does and Microsoft even put it in writing!
So, if you want to demo or do dev with C5 on your XP machine, you're out of luck with IIS5. You'll have to use a different web server. XP's IIS version can't be updated.
I wish there was some way this post could be marked as helpful... or perhaps the answer to a question...
hmmmm.. that sounds interesting, doesn't it. ;)
-frz