Use these settings:
Netmask/address mask: 255.255.255.0
Broadcast address: 192.168.1.255
IP address range you can use for your computers: from 192.168.1.1 to 192.168.1.254
If you just have two computers, use 192.168.1.10 and 192.168.1.20 (that's the setup I have, leaves some breathing room between addresses, just in case, you never know).