I have a wireless ADSL router that i connect to the internet through, one computer is connected to it through a LAN cable and another connects to the wireless network for internet access. I want to know how I can connect these two computers so they in the same local area network and can share files, printers and play multiplayer games accross it as you would with a normal LAN.

The easiest way is to run the Windows Networking Wizard on both pc's. You then need to allow file and print sharing. It is slightly different for each version of windows, but check the windows help files. They are pretty detailed. If you run into a problem, post back with the specifics.

OK I ran the wizard on both computers (they are both XP) but they arent in each others My Network Places or Workgroup computers.