Do not buy some cheap Chinese dongle. Get something from D-link,belkin,or netgear.
I am assuming that you will connect your Reliance connection to your main PC's Network Adapter.
1) Right click on My Network Places > Properties.
2) You shall see an icon for Local Area Connection and Wi-Fi connection.
3) Right click on the Local Area Connection that connects to your Reliance. > select Properties.
4) Click on the Advanced tab.
5) Check the box. Allow other network users to connect through this computer's Internet connection and press OK to share your connection through this NIC.
6) You will receive a warning window. Just Click Yes and continue.
7) Now Make sure with checking IP Address. Right click on Local area Connection. > Properties > TCP/IP >
IP : 192.168.0.1
Subnet : 255.255.255.0