Hi.
[ This is my first post btw

]
I thought that you might like to try the following.
On IIS5 with CF Server 5 I do this:
In IIS5, go to your website's properties, click 'Home Directory' and then 'Configuration'.
In the 'App Mappings' tab, edit the .cfm item and check the checkbox 'Check that file exists'.
This is the first part. When the file is not found it won't display the ugly Coldfusion file not found error.
It will now show the IIS error.
For the finishing touch, create a directory in your webroot called 'errors' and place a 403.cfm and 404.cfm file.
This way you can create a nice custom error message + insert the error in the database (if necessary).
To activate your custom error pages you must go back to your website properties in IIS and click the 'custom errors' tab.
Select the error that you would like to edit. (In this case : Error 403;15 for the directory browsing denied and 404)
Edit the error mapping and select 'URL'.
Type
/errors/403.cfm
When your users get a 403 or 404 error they will get your custom coldfusion error page.
I hope that this was helpful to you.
Michael Lambert
Gent, Belgium