In my setup I have DSL modem that does not store PPPoE Login information, instead this info is handled by D-link Dl-604 router. Because of this my Dl-604 is my DHCP server. My RB411 is connected to one of the LAN ports on the 604 and I am using this setup to share my DSL connection as well as have access to my office PC's files I need to work on at home. I share to my home RB411 that is then connected to Linksys WRT54G so that I may be able to use wireless devices on my business DSL connection. I am having a lot of trouble with DHCP conflicts I think. Everything will work well for a while and then crash dramatically. Does anyone have a good suggestion on how to handle a setup like this properly? Maybe I can use the RB411 connection as a raw pathway and let the Dl-604 handle all of the DHCP? How is the best way to make the RB411 not use DHCP? BTW I use my WRT54G as an access point only. DHCP is turned off. I am, however, running DHCP server on my office RB411 and DHCP client on my home RB411 while Dl-604 is also running DHCP server.

Use the 'tik to interface directly with the DSL modem/bridge to start.

Man, that was a pain! Ok, the D-link handles my PPPoE login and also serves the other devices at my store which are the only reasons I didn't turn DHCP server off on it in the first place. The only way I have been able to get a transparent WDS bridge to work is by firstly giving my AP RB411 an IP address on ether1 so that the d-link would recognize it. The strange thing is that the only way I've been able to keep a solid connection is by adding DHCP relay on both the AP and the station. Is this typical?

you can try having the interface that connects to your dlink be a dhcp client. Then srcnat through your mikrotik to the other interfaces.