Two ISP connections with Natd

[David Bila]

Dear All,

I am running freebsd as getway for my office. I Just acquired second 
Internet last week. I wonder if there is a way trhough route add -net and 
ipfw I can manipulate my traffic in a such way that some traffic to a 
selected network can go through one ISP while the rest goes through the 
default gateway. I am using natd and my FreeBSD box has got 3 NICs, one for 
internal network and other two for each ISP.

Please Help, David