Ok, get a USB wireless card and install it according to manufacturer's instructions. Then (i assume u are using windows XP), select the newly added "Wireless Network Connection" in Start -> ControlPanel -> Network COnnections, right-click and choose "properties". Then click on the Tab that says "wireless networks", (see picture below)
* Check the box labelled "use windows to configure my wireless settings"
* Click Add.
* In Network name (SSID), type a name for the wireless network.
* In Network Authentication, click an item in the list. For the network authentication method, it is recommended that you choose Open. When the open method is combined with a wired equivalent privacy (WEP) network key, all network traffic is encrypted. If you choose Shared, a network key is still required, and even if you use a WEP network key, network traffic is not encrypted, which makes your network more vulnerable to intrusions.
* If you want this to be a security-enabled network:
o [li]in Data encryption, select the encryption method. In Network key, type the network key, and then in Confirm network key, retype the key. (this is like a password so that snoopers don't use your network to browse for free)
o select the This is a computer-to-computer (ad hoc) network; wireless access points are not used check box.
CLose all the dialog boxes. Now do the same on the other computer.