wordpress file:/// replace backward slash with forward slash

Hi all,
Currently have wordpress setup on Centos 6.4 with LAMP.
Everything is running fine.

I’ve searched google and forums but just need a little more help to make the linking to local files easier using file:///

I’ve added the following plugin into wordpress with the following code and activated …

<?php
/*
Plugin name: Allow file protocol
*/

function rh_allow_file_protocol( $protocols ) {
         $protocols[] = 'file';
         return $protocols;
}

add_filter( 'kses_allowed_protocols', 'rh_allow_file_protocol' );

The URL now support the file:///

I copy the local path for a file to link for eg T:\test\test document.doc and paste the path into the URL field
I then publish my changes
In the browser when I hover over the link it reports the following file:///T:testtest%20document.doc

It’s part way there.
– It automatically appends the file:/// then the path I copied
– It automatically replaced the ‘space’ with %20
– However it strips the backward slash out completely
I need it to strip the backward slash out and replace it with a forward slash so the path works.

I’ve had a play around with preg_replace, but don’t exactly know where to put it.

Any ideas?
Thanks