ifconfig question

When I run ifconfig to check my network interfaces I get this for eth0:

eth0      Link encap:Ethernet  HWaddr 00:40:05:81:60:8E
          inet addr:192.168.0.4  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:516 errors:0 dropped:0 overruns:0 frame:0
          TX packets:262 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:174653 (170.5 Kb)  TX bytes:46037 (44.9 Kb)
          Interrupt:5 Base address:0x3000

The entry "inet addr:192.168.0.4" should be "inet addr:192.168.0.2".  What
file do I alter to reset this?

Thanks for the help!
Jerry