Whats a good way to share two gateways (routers) on one LAN?

What i mean is i have two WAN connections. One static IP and one PPPoE ...

right now i am running off the Static IP and all is well.

I want to add the second connection which is the PPPoE and have my LAN benefit from both. At times the PPPoE connection has more bandwidth which is better than the static wan connection.

Please help/advise.

Give this a try:
http://wiki.mikrotik.com/wiki/Manual:PCC