Optional Save to SENT

[Ramy M. Hassan]

Hi,
I do not offer much quota to my users. So I need to make saving the sent
messages to the Sent folder optional with a checkbox. Without being
check the default behaviour is NOT to save. Can anybody tell me where in
the source can I add my if statement to control the saving. I imagine it
would be something like :
            if (*cgi("SaveChecked")) {
                        // the code I want to find
            }
Thanks