Second ip public nat on second lan interface. How to do?

[cybermod]

hi all,

i have a big problem…  :(

I have a pool of public ip on my pfsense's wan and i have many lan interface.
I want that all client behind one my pfsense's lan interface (ex. lan 3), come out this another public ip. I also need to do one vpn site to site in ipsec.

i have read that i need to manual outbound rule, but i am not able to do it.
Can anybody help me?

pool public ip  -- wan pfsense -----  lan1    ip public 1
                                                        lan2    ip public 2  and ipsec
                                                        lan3    ip public 3  and ipsec

My lan (1,2,3) are gateway for my pc.
I have created virtual ip.

Tnx so much

Little result!
I have created one outbound rule in this mode:
interface "WAN" protocol "ANY" source network "MYLAN3LOCALIP" Translation "second public ip in Alias Tab".

Now, my cliend behind lan3 come out with another public ip: good!
But, how i can do a vpn site to site ipsec?

Regards