Multiple CE to single PE on the same VPN

[mainstreetexpress]

Hi
I am looking into MPLS VPN's and I have successfully built a lab to test this.i.e. CE-PE-P-P-PE-CE, No problem

However I cannot find any sample configs to show how more that one CE belonging to the same VPN can be connected to the same PE. i.e. CE-PE-P-P-PE-CE
CE/


This may be very simple but I'm a newbie to MPLS VPN's so I'm not quite sure what to do.

Any help would be greatly appreciated