Redirect Packets from ppp0 interface to ethernet interface in linux

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http://unix.stackexchange.com – my question is similar to this question, however with some change. I have a PPPoE connection on my Linux Machine (CentOS kernal 2.6.32) as a client, so that when i setup this connection, another vritual tunnel interface comes up i.e ppp0 This connection is setup over existing physical interface eth0. Now what i want is that, create another virtual interface (Ethernet type not ppp type) and somehow map it (bridge) to this ppp0 interface, so that if i route the traffic to this virtual interface, it is inturn routed to this ppp0 interface and vice versa. Can you please tell me how can i do thi (HowTos)