How can I avoid ugly 404.13 error messages when a user tries to upload a file to the server that exceeds the maximum size?

If a user tries to upload a file that exceeds the maximum allowed, they are greeted with an ugly server error  

HTTP Error 404.13 - Not Found
The request filtering module is configured to deny a request that exceeds the request content length

Is it possible to give them a friendlier message than this?

I know IIS has the facility to assign custom error pages, but this is for primary error codes - for example a 404 error, if you try to enter a custom page for a 404.13 error it says '404.13 is an invalid status code. Status codes must be numbers in the form of 400 or 500. Status codes must be between 100 and 999"

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Éric MoreauSenior .Net ConsultantCommented:
you can also validate the size before uploading if you use
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