I replaced my BEFSR41 with the BEFSRX41 above to get the access control features. Both are 4 port fire wall Broadband routers..the X has VPN (that I dont use but got cuz of the access controls) Can one use the BEFSR41 (that I replaced) as a switch for port expansion in conjuction with the other Linsys "X" routher? Can I use the WAN input port on the replaced Router as the input so that I still have 4 other usable ports on it? Im using a 4 port DSS=5+ D-Link switch now and it would be nice to stack to two Linksys routers cuz they are made to do that. Or am I better off just leaving the Dlink and my port expander. Any tips appreciated.