One WAN ethernet interface and 2 DSL line

[cauchy]

hi,

There are 3 ethernet interfaces attached to our PC…

e1-> lan
e2-> dmz
e3-> wan

We have 2 external connection. C1->Internet ADSL1, C2->Internet ADSL2.
We have 2 IP segments on the LAN. IP1->End Users, IP2->Server
We need internet access durıng the source based routing mechanism... (IP1->C1, IP2->C2, Default gw = C2)
We don't need WAN faıilover or load balancing between two DSL lines...

How can I do this process with PFSense?

Regards....