Dual WAN with Dual LAN Gateways

[deltaend]

So, I've got a dual WAN setup and I've setup a virtual IP as my second LAN IP address.  What I want is for DHCP to setup people to route automatically through the main WAN, but static assignments (on the same subnet) can be set to route through the other virtual LAN IP as the gateway and DNS.  My problem is… I'm not sure how to make sure that the virtual LAN ip routes to the second WAN connection only (and works with its own independent DNS).

Thanks guys.