i think its similar to windows 98/95, go to your startmenu, the go to RUN, then type in "winipcfg" or "winipconfig" or "ipconfig", it should bring up a nice window showing all of this stuff.
are you trying to connect your xbox to your pc via a router or a network card and crossover cable?
my other name became inactive (was super busy for a month).. oh well..
i prefer to use a router with a dhcp server (most routers have this built in), it makes connecting to the xbox much easier..
also be sure that if you use a router to make sure in your evox.ini that STATIC IP = NO (since the DHCP server will assign one to the xbox)