LOAD BALANCING WITH FAILOVER ON ADSL

My question is, how to do load balancing with failover within 2 more conecctions on wan interfaces if this vary its ip because dhcp? (example ADSL MODEMS) the CONFIGURATIONS seen evrywhere this page have examples with ip static asigned.

can somebody give me an example of load balancing with failover betewen 2 wan interfaces using ADSL modems ?

check this… http://forum.mikrotik.com/t/cant-do-the-load-balancing-in-3-0/15298/1