2 Wan 2 Lan routerboard configuration

Hello. I need same help for configure a RB951G routerboard.
I Have this scenario:

WAN1: 1.1.1.1
WAN2: 2.2.2.2
LAN1: 192.168.1.100
LAN2: 192.168.2.100

what i would try is that everything coming from LAN1 goes outside WAN1 and ever everything coming from LAN2 goes outside WAN2.
and also make a kind of failover so that when the WAN1 goes down all the traffic will be redirected to WAN2 and viceversa.
Is it possibile?
Thanks for help
Doug

recomend you to read this thread
viewtopic.php?t=90149
and also somehow modify this firewall rule
open winbox.
IP-> firewall
add firewall rule

chain forward
in interface eth1(or other name depends on your network configuration)
!(negation) out interface eth3(or other name depends on your network configuration)

click on top on action and choose drop
and hit apply button.

IP-> firewall
add firewall rule

chain forward
in interface eth4(or other name depends on your network configuration)
!(negation) out interface eth2(or other name depends on your network configuration)

click on top on action and choose drop
and hit apply button.

this firewall rule should work...

Thank you conecting for your suggest. l’ll try and make you know