2 Gateways with 1 Local Lan

can somebody please post for me a working config for the above with load balancing capabilities i have tried the example given on the wiki but without much success. The traffic goes through one GAteway only. I have two public ips which i need to load balance. When i do the mangle i get the errror. invalid ??? 1,1,0 ??? integer. Please assist i i need both the links urgently up and running