dhclient withmultiple ip's

[Donald Mohlmaster]

I am attempting to have dhclient grab two ip's from comcast.  I know I have 
to set up the dhclient.conf with the pseudo section, but I am lost as what 
to do with the dhclient-script.  It has to be different as to not drop the 
main interface ip configuration, but everything I do seems to just assign 
the same ip to the iface twice.   Does it have to alias the second ip?  Are 
there any suggestions you can give me?

  FreeBSD 4.7-RELEASE-p13 #22
isc-dhcp3-3.0.1.r11


Thank you for any help you can give,

Don