ip addressing

i have 2 servers, 1 has t1 nic (static ip) 62.209.32.130 w/ gateway 63.209.32.129 and a connection sharing static lan address 192.168.0.1 w/ gateway 63.209.32.130. the other server has 1 nic and id like to give it one of my available ip addresses (63.209.32.131) so it can function as secondary DNS server. is there anyway to do this? do i need to setup the new MS ISA proxy?