There is a loginPage property of the cms section handler, which is defaulted to "login.aspx", that can be configured through the web.config.
So add loginPage="../newlogin.aspx"
to the cms section like so:
|<cms defaultProvider="Sitefinity" pageExtension=".aspx" loginPage="../newlogin.aspx" disabled="false"> |
One issue I have noted in testing this is that you can't use the tilde(~) to resolve the url, so if your file is outside of the sitefinity folder it has to be loginPage="../login.aspx"