Http -> Https Redirection

Had LOADS of trouble getting this to work on our site. We took the customer error page approach, creating a new page called redirect.htm and pointing the 403.4 error to the new file. However no matter what permissions we set on the file, we ALWAYS got an access denied error.
We managed to hack out way out of this by editing the real 403.4 error file and putting our redirect script block at the bottom.

If anyone has any cunning plans or advice, please post a reply!