The latest version of WLW and ScribeFire, for that matter, are very good at auto-discovering various settings.
Thanks for your comment.

Thanks for your comment.
I am not a PHP developer. My focus is primarily on being able to use these tools without too much struggle. Unfortunately, a lot of documentation on the web either assumes you are a guru who just needs to be reminded to grek #sud !~alk – or something obscure like that – or is just plain incomplete and not working.
I agree the path seems odd. When I installed the XML-RPC protocol, I couldn’t figure out how to connect to it. After much trying, ScribeFire found it for me (although, the latest release of ScribeFire (version 1.7) doesn’t seem to be able to do it any more. sigh).
As well, I cannot get the plugin to work with Joomla! 1.7.
With Joomla! 1.5, the path ended with index.php – which seems to be the more standard way for PHP modules to be invoked.
The second path form occured because someone was having problems with their install. After some troubleshooting, it turned out he had installed joomla! into a subdirectory of htdocs – in which case, he needed to add the path to the subdirectory.
Normally, your XAMPP + joomla! install path would look something like this:
C:\xampp\htdocs\joomla – where all joomla! files and folders are installed in that joomla directory.
However, you can also install it like this:
C:\xampp\htdocs\top_directory\joomla – where everything is installed one directory below top_directory, in which case, you have to use the 2nd path form.
Hope this helps.