fist time with mikrotik, how to do a fixed load balance setup?

Hello, iam new with mikrotik products, i have an 1009 router with 8 ports (1 is combo), i need to do what i call a fixed load balance setup, that is the following:

Port 1 : ISP1
Port 2 : ISP2
Port 3 : ISP3
Port 4 : ISP4
Port 5, 6, 7, 8 : LAN with DHCP ( 1200 ips max in the future, 300/400 for start (Pcs, Aps, and mobile users)

I need that all devices connected to :

Port5 only use ISP1 (Port1) to go to Internet
Port6 only use ISP2 (Port2) to go to Internet
Port7 only use ISP3 (Port3) to go to Internet
Port5 only use ISP1 (Port4) to go to Internet

I try to use the most simple setup, and less CPU load used.

I will use winbox because like i say its my fisrt time with RouterOS, and i used to use easy setup routers, with my old router i just go to load balance setup, and add 4 rules to do that setup.
Really i will appreciate your ideas or advisors.
Thanks

Duplicate post, please move to here to follow…
http://forum.mikrotik.com/t/newbie-at-routeros-fixed-load-balanced-form-0-in-ccr1009-help/147463/1