ISA 2004 and 2 Internet gateways:

I have a single ISA Server 2004 Standard on Windows 2003 with 2 NIC's and I want it to protect 2 internet gateways.
I want to use one gateway for outbound web access only and the other for everything else.
But from a routing point of view, the ISA server sends everything out the default gateway.
Can you think of any way to route web surfing traffic (where don't know the destination) out to the internet but not through the default gateway?
I guess you might call it routing based on the protocol (can ISA 2004 do this?).
NOTE:  I'm not looking for a failover solution!
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mwitdeptAuthor Commented:
It may be possible to use a combination of protocol rules and routing rules in ISA server to get this done.
Thanks for the useful resources.
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