of ephemeral value...

I finally found the magic combination of words for google to lead me to this rewrite engine for IIS. For a while now I have wanted to have an equivalent to the Apache configuration line:

Alias /wibble /scripts/wibble.php

which allows me to hide php scripts inside URL’s that look like directory structures.

The isapi_rewrite version is:

RewriteRule /wibble(.*) /scripts/wibble.php$1

The install .msi was quick and simple, and you can edit the config file and the changes are immediate without having to restart IIS.

Finally the lite version (usable on a single site) is free and the full version (usable on virtual hosts) is just $69.