This is no question but a feature I did not know about sitefintiy that is so conveniten that I had to share it. Maybe some other people don't know it as well.
is the page
You want the clients to be able to access the page like this
-> no .aspx at the end.
Looks much nicer also for marketing reasons on paper and you dont want to tell your client on the phone the ending to the page, which they would mess up anyhow.
Just poinst your 404 erros on the server to sf404.aspx (the file must not exist on server). Sitefinity will do the rest.
Thanks a whole heap to the telerik team.