2 ISP In & 1 LAN Out For Users

2 ISP DSL Line in and one LAN out.

All LAN users can use both ISP lines.

How can it possible by winbox interface.

(Please Guide in winbox interface)

Any Help?

Perhaps this will help: http://forum.mikrotik.com/t/how-to-setup-a-router-to-do-dual-wan/27075/1