Iis

Im trying to setup a IIS 5 server, running on a win2k pro machine. The problem is that the computer doesn't have a direct access to the internet, it access it from another win2k computer via ICS (internet connection sharin). The server run fine and everything but when it come to pick the IP well i can only pick my local adress (190.168.xxx.xxx or something like that) and i was wondering how i could set it up......

i know im in the wrong place for that kind of question......but noone have any idea?? or a place where i could find help